Easy to use with good sound quality, defectively fragile mic wiring
340902
I bought my LX-3000 a few weeks ago at a local store. It was new, with the factory seals on the packaging. I use it with a couple of laptops - one with Windows XP and one with Windows 7. On both the installation was effortless, although the Windows 7 install took a while to get the drivers off the web - but it was completely automatic with no user direction required after just plugging it in to a USB port.

For the price, the sound is good and the mic sound is good as well. I wouldn't try to use it outside in any kind of breeze based upon the care I had to use to avoid the mic picking up breathing sounds, but in an indoor office environment it works well.

For the most part I used it 2 to 4 times a week, with the rest of the time the headset is in my laptop bag.

My only (and big) complaint is with the lack of robustness of the mic wiring - as it goes in and out of the little box with the mic mute and volume control buttons. For a while I could get the mic to work by gently wiggling the wires on the USB connector side of that box. This morning it seems to have died completely but for occasional crackling noises. I don't consider my usage to be physically abusive and I have had another headset (a Sony) last 4 years in the same usage. From what I can tell, the weak spot on these headsets appears to be the mic wiring to the little control box in the middle. I saw a previous reviewer comment on failure  after 40 days, and another user with 8 of them comment on how a number of them had failed after around 6 months of use. My experience is between these, but I do have a mic wiring failure after what I consider a short time of non-abusive use.
626210
I work as a Karaoke DJ. I recently purchased the PDWM5500 after my old Audio2000's AWR6547DU met an unfortunate end. I wanted something less expensive since I'm frequently dealing with intoxicated people.

Out-of-the-box impressions:

Pros - The receiver has dual antennas, independent gain controls for all 4 mics, and a balanced XLR mixed output. It comes with rack mounting hardware for those who need it. The mics use AA's instead of 9V, and don't feel too light (once the batteries are installed).

Cons - As others have mentioned, the battery covers come off rather easily. I typically have to wrap a piece of clear packing tape around the base to keep them on. The antennas on the receiver cannot be removed and have no means of being locked down when not in use. The buttons on the front of the receiver feel cheap and one of them was almost pushed inside the unit, though it still works.

After using this system at multiple bars in a major city for 1 1/2 weeks:

The sound quality is decent (though definitely not on the level of my old mics), though I have to turn up the mic gain on my mixer rather high to effectively pick up most of the singers. Harsh consonants are picked up a little too easily and require an adjustment on the part of the singer to compensate.

I have no issues with VHF interference, but I frequently encounter drop-outs when someone is moving around with the microphone. I wondered why this was happening in a dual-antenna system, so I more closely examined the receiver. These are **not** diversity antennas. One antenna is for mics A & B, and the other is for mics C & D. Even with unobstructed LoS to the receiver, and standing no more than 10 feet away, I still encounter drop-outs.

These mics are not particularly durable. It's only taken a little over a week for one of them to break. I had a customer drop a mic on the floor, and something broke internally - a few small fragments of plastic fell out when I removed the batteries and that mic no longer functions. My old Audio2000's were dropped, banged around, and generally abused for a year before I had any issues whatsoever.

You will definitely want rechargeable batteries. While a set will last ~12 hours, each mic uses 3x AA's. My old UHF mics only used 2 and functioned for just as long.

Final Verdict:

If you need a decent wireless system in an environment where the mics will be mostly stationary and will suffer little-to-no abuse, these are a great deal.

If you plan to use these in a high-stress environment where there is a moderate risk of mishandling or misuse, you might want to invest in something more durable.
2514
I'll start off this review with the cons and the fixes I took to fix them. It has an absurdly long wire (but I can see why this is useful for some people; I'd rather long over short, but to compensate I had to spiral the cord around the stand itself). Additionally, it was absurdly quiet compared to other mics when I first set it up; it was a simple fix, I just decibel boosted it to max and it sounds fine. It also lost connection somewhat frequently, with the audio fizzing and crackling like a loose connection. This was fixed by simply having the mic upside-down in the stand, which the stand holds very securely. I think it was an issue with the connection at the base of the mic, where the line plugs into the unit itself.

Besides those (incredibly minor and simple-to-solve) issues, it's a great microphone. Amazing clarity for the asking price, with the stand and dual pop filters both being amazing perks. The holder (pictured in the product photos as silvery-white) is secure and very, very reliable against shaking. The mic stays in its place, but can be easily moved while clamped in. The bendy pop filter is a little tough to maneuver into place to be between me and the mic, but the secondary filter takes care of it.
4220046
These are really good headphone! The mic works well and the sound is pretty nice and clear. My only complain is that the wires are very thin and feel like they could easily break/fray.
2365044
Good sound quality but the wire that leads to the headphone jack crimp tends to split open to reveal the wires inside - I've had mine replaced twice under warranty in 5 months... the tension may be too set too high & doesn't score high for durability.
2307822
These fit comfortably on my large head and I really enjoy the sound quality: a great value. They pack neatly into a small bag, which I've used to transport them daily between home and work. The one big flaw is that there are loose, fragile, thin wires outside the ear cups that catch on things easily. The insulation on my left thin wire came apart after ~30 hours of use and had to be glued back into place. Fortunately the sound quality was unaffected.
2711812
Pros: They are very comfortable and good sound quality. Amazing headset when everything works. Cannot deny they are very comfortable and can stream and game for hours without realizing your wearing a headset. Sound is very good for the price and mic quality is pretty solid as well.

Cons: Mic stopped working just over a little bit past a month of usage and unfortunately will have to probably buy a mic separate in order to stream which is a pretty big inconvenience due to the return policy.

Final Thoughts: Is actually a really nice headset when stuff works, but it seems like many people are having issues with their mics, so buyer beware with this headset.
3156235
When dispatching, wires are not that big of an issue. Besides, wired headsets don't crackle and pop the way bluetooth devices sometimes do. I used a cheaper wired version and was disappointed by the sound quality. However, on this set, I can control the volume and it helps immensely. It is also helpful that this microphone does not cut out when both parties speak at the same time, like some models do.
2967972
The sound quality and feel are pretty good, but breaks too easily. The first one I purchased broke when it caught on an armrest. I liked the performance until then well enough to order a second pair, but that one broke more easily. I would recommend it if you tend to be very careful about never getting the cable caught in anything, but having used other similar products that could take some minor abuse, was let down by how easily this gave in within a week of use (both times)
3616112
The mic has impressive audio quality. I also like how the base is actually made mostly out of real metal, which makes it nice and heavy. It'll stay on the desk, and feels like it's made of quality components.

However, the mic really needs a better pop filter. (That means when you say the letter "s" or the letter "p" it'll make a loud hissing or popping noise.) This is a HUGE deal-breaker. Also, sometimes the microphone pole will slip or droop down a little.

The noise reduction is a great feature, but can also backfire sometimes when you're speaking softly, so be careful.

You can't do much better than this for less than $20, so it's good for the price. Just be ready to hack on your own pop filter.
3596446
I've used this for about a year on my 3.5mm plug modded ATH-AD700s. The sound quality is leaps and bounds above a webcam mic and it can be easily rolled back to keep the mic behind the headphone drivers and out of my face when not in use.

The only issue I have with it is the remote is an awkward length from the headphones and clips vertically instead of the standard left-facing or rotating clip design most headsets have (for button up shirts and attaching to jackets mostly). It's not like I go around wearing shirts with front pockets on them if I'm not at work, and that's the only place the vertical clip and cable length makes sense. I mostly clip it to my left shoulder seam, but that makes my shirt drift off to the side. Clipping it to the button area of a shirt with buttons or the side of a jacket is okay if you don't mind a cable to the chin every so often, but even my $15 earbuds came with a rotating clip.
949707
UPDATE 3/4/2016 - Plantronics sent me a replacement (second two photos) set whose cup seams appear to be good. Fingers crossed that they'll hold up over time - if something happens, I'll update this review.

Bought these back in August and have loved them ever since. They're clear-sounding and balanced, yet have enough bass to rumble my head on demand. The noise cancellation brought the noise level at a local minor league baseball game down to comfortable levels. The mic is pretty decent as well, though I sometimes get complaints from my friends that their voices bleed through the headphones back into the mic. Overall, it's great.

Now, that said, mine seem to have a defect with the right cup's foam cover (first set of photos) - the seam has separated, exposing the foam. I'm not sure if this was something that happened over time or was simply a factory defect, but I've contacted Plantronics to get a replacement sent. If they send one, I'll check both cups to be sure the seams aren't defective and update my review accordingly.
1484548
With lav mikes running anywhere from $10 to $250 these days, it is nice to find a $25 unit with tie clip and wind screen.  Sound quality is excellent and works fine with wireless systems.  It does, however, require a bias voltage to work properly as do most condenser mikes.  Most all systems (azden, sennheiser, etc) provide this bias on the connector to make the mike work so it is not a problem.  Be sure your jack has around 5 volts or so on the mike terminals and you are good to go.

FYI - the price of the whole mic is less than the tie clip and wind screen bought separately, so if you need to replace a lost part just buy a new mike!
1402850
The Hisonic HS 700 is a first-rate microphone system.  It is light and portable, easy to set-up and use.  It fills a large room (~100 people) with sound and has good fidelity.  We use it for talks about music.  Battery operation is a great convenience; you don't have to hunt for extension cords in strange environments.  Its easy to go from the speaker to recorded music (on computer) and back with the Bluetooth, and the second microphone allows questions from the audience.  The system has worked flawlessly for the six months weve had it.

I would give it five stars except that the controls are poorly designed.  The top most grouping of controls are various FM knobs that we don't use, and whose functions are only described in the marginally useful manual.  The power switch is labeled well, but is on the bottom.  In the middle are the most important controls - various microphone adjustments.  The Bluetooth is labeled BT ON/OFF REMOVE on an inconspicuous button.  This had to be held down for 3 seconds, a fact that you have to get from the manual.  If the manual is unavailable, the speaker is out of luck.  Operation of the Bluetooth control should be made clear on the control panel.

Despite my criticisms of the controls, this system has proven to be very useful to us.  I recommend it and would buy it again.
2080882
I used them for transcription purposes, and the audio quality was awesome! But the wiring did not hold up and shorted out quickly, only a few days after the warranty expired. I was overly cautious with them due to my work depending on them, so I was greatly disappointed when they shorted out. The price was way too expensive to not last any longer than they did under such cautious circumstances.
228641
Easy to use, solid connections, sound great.

Getting speaker wires into the holes is not always straightforward. You need to unscrew the cap, put the wire through the hole in the cap so just the tips poke out the other side, then fold them out so they will be crushed in the hole as you tighten, but not so far that they are covering up the threads. This provides a secure connection.
3440454
Works great, I bought it for PC use. the spund is clear and the mic works fine, but the tip of the cord breaks very easily. Ibought twice and had the same problem both times.