Works great for 2 years, but not enough mist...
591170
I bought this humidifier in 2016 (it cost more back then, ha!), and have been using it constantly since then, almost two years of constant use.  It has not leaked once.  It is extremely quiet for a humidifier.  It auto shuts off when it runs out of water every. single. time.  Nothing has cracked, and I've dropped it many times and it hasn't cracked or shattered one little bit.  It's easy to clean, even using hard tap water.  I don't know what people's problems are, the reviewers complaining about these things, maybe they got bad ones.
My only problem with it now is, I recently got a gauge to measure the exact level of humidity in my little room, and it doesn't put out enough mist to raise the humidity in my small room.  Even on the highest setting, in my small room, it doesn't change the humidity more than a couple percentages.  If the company has any suggestions that might help, I'll be happy to adjust my review, because this really is a great little humidifier.
2734934
Loved this in the beginning but it's not working anymore after 2 years. My toddler just peed the bed and it's soaked through. I think for $70 it should last longer.
4683876
As the humidifier ages, it becomes impossible to work.  Some of the old units contain a bearing that wears out.  Go with a warm mist humidifier.
3804589
This unit worked great then died after 2 years. We noticed a reduction in allergens from cat dander and dust, as we had to clean our filters every 2 weeks. The replacement filters aren't terribly expensive. The only downside I found is that is tips over fairly easily.
3640385
Got this humidifier from Home Depot a couple of months ago and it has been working very well so far.  As soon as you turn this thing on, it immediately (!) starts to emit a strong plume of mist. It is whisper quiet. You have to listen hard to hear it even from just a few feet away in a quiet room.  It has been a very reliable little workhorse so far. Amazingly, one tank of water lasts over a full day! Even on the highest setting. Yet it does seem to actually be humidifying too.

Another really cool feature is that not only does it look really nice, it is also well designed: when you sit it in the sink to fill it, it fills all the way up, leaving no air pockets. The handle is moulded into the plastic of the tank in a comfortable to grip location and depth.

The only quibble I have with this product is that the mist it produces stays hanging in the air, thus giving the place a look like it was smoky inside, as if someone had just burned dinner. Doesn't smell like that - doesn't smell at all - it just looks like that... Especially on a sunny day. And, since sunny days are few and far between in the winter here in Vermont, I tend to prefer seeing it in undiluted form when it does finally show up.

Other than that, so far, it's a great little humidifier. The only reason I am so repetitive with the "so far"s is because we have not had the unit for very long yet. If this lasts through next winter, I will be back with an update.

UPDATE: 4/09/2013: I have to drastically reduce my rating on this product. As it turns out, the mist that "stays hanging in the air" does not, in fact, stay hanging in the air at all. It attaches itself to all available surfaces - windows, walls, dishes, furniture, floors, fixtures, electronics, etc. anywhere and everywhere it can reach - in the form of a sort of fine clingy dust that settles everywhere, whether the surface be horizontal or vertical. It is not easily removed either, like with a duster or a dry cloth. No. The best way is using a damp microfiber cloth and put a good bit of elbow grease behind it.

Since I can see this deposit, which I assume is probably a mineral deposit, on every shiny surface, I imagine it also gets into the cloth stuff, like cloths, carpets, and the like. Possibly not too good for the lungs either. So I stopped using it months ago. I had purchased two of these units. One never left the box. The other probably still works, but it won't be doing it here anymore.

I most definitely do NOT recommend this product to anyone now.
2275728
It would be great if it worked longer than 10 months. It did have it's quirks from day one, but overall I liked it; I liked the alarm than would let you know if you needed to fill your topoff container, or if it would overfill. The water level sensor is a bit slow to react and after 10 months would overfill or not fill at all. I've contacted Hydor, let's hope they help; its a bit pricey for unit that works for only 10 months.
2771855
I have had mine for many many years with virtually no maintenance and it has worked beautifully.
If you pump more, its a mist - less it's a spray.
It has recently started to leak. I am going to give it a good rinse to see if that solves the problem
4609128
This does what its supposed to and very well. This is my 2nd device to enable even more moisture. Unfortunately, I cant say the motor that throws the mist is very durable, as my first Spt has a failing and rubbing motor only after 1 season. I hope this 2nd one lasts a lot longer.
4690438
I've had this humidifier for over two years.  It is very quiet and produces a dense stream as shown in the photo.  The warm mist is very comfortable.  My main issues with the humidifier is that it doesn't produce enough moisture to adequately humidify.  In order to keep a single room moist, I have to remember to keep the door closed to the room.  So I find that I want to direct the mist at my head while I sleep.  The problem with this approach is that if it's too close to the bed it saturates the bedding.  So, it would really need to be elevated four feet above the ground in order not to have the bed feel wet by the morning.  Additionally, it's really hard keeping up with filling the thing due to the small water chamber.  It's not hard to fill, but it must be done in a bathtub due to the depth of the unit.  I have not had the white dust problems that others have had.  If this unit produced more moisture, was easier to fill, and had to be filled less often, it would be great.  Someone needs to provide something that can tap directly into your water line.  I have such a thing for my basement unit (attached to my furnace), but it doesn't really make a dent in the humidity.  These portable units provide noticeable changes, but are much more of a pain to maintain.
2225226
I had issues with this model and posted this review "This works fine, but there's no good way to clean it.". Their customer service contacted me and sent me a smaller model that you can clean the mist tube with. I prefer that model and I'm very impressed with their follow up!
4273375
This cool mist humidifier is pretty good. I have it in a smaller room and helps out when its dry.  I have used this same humidifier in the past, only to have it last maybe a few years.  I clean it every few weeks but eventually the plastic will start turning white in color in the base itself. ( even using filtered water)  That is normal but its a good unit for the price and should be replaced every 2-3 years.
1334997
I've had this unit for going on three years and have used it for 2 full winters. The mist flows up and then comes right back down, leaving condensation on the unit, but I've fixed that by putting a small fan next to it to help disperse the mist. It's a viable solution that'll work with any humidifier, as most will have this problem. I've also seen complaints about the white dust that is left coating your furniture after use. I had that in my old apartment where we didn't have an air filter and now that I have an air filter, as long as I clean the filter, most of the white dust is trapped and I don't have that problem anymore. As far as how well the unit works, the air feels great. I can physically feel the difference when the unit has been off or is out of water.

After two seasons, the right tank started to leak, not continually but occasionally, so we put a plastic lid underneath to catch any leaks while we wait for a solution. If one of the tanks empties, the other one leaks. We found no cracks and even put epoxy on all the seals in the hopes to salvage this unit because we liked it so much. That didn't fix the problem. It looks like the cap is no longer airtight and is letting air into the tank, which is messing with the unit. I've just contacted HoMedics to see if they will replace the right tank. I will update after I've heard from the manufacturer.

Edit: After a year, no response from HoMedics. I'm replacing this unit with a Vornado because I don't want to deal with the leakage anymore.
4000371
Works (and still working after 2 yrs) great.
3731757
This mister is a mixture of the very good and very annoying

Pros:
It produces a good cloud of fine mist
Hasn't clogged on me when I add herbs to the oil
Glass body is dishwasher safe
Makes effective use of internal space. You fill it up almost to the top and mist until you hit bottom - very little waste - big selling point here
I've had it for close to a year with active use. We shall see. My last mister lasted close to 5 years.

Cons
Somewhat fussy - other reviewer recommended releasing the pressure in between use (a good idea for any mister)
the good cloud of fine mist gets everywhere - including the mister
needs close to 20 pumps to work the pressure to full - my old pump only needed 10
I purchased a glass mister because I was worried about putting plastic parts into the dishwasher and leaching chemicals into the oil. So now I put the glass into the dishwasher and wash the pump by hand. Not much of an improvement.

Update: Dec. 8, 2011

I just purchased the Misto 2 pack from costco.

You can see a picture of the&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Misto-Gourmet-Olive-Oil-Sprayer-Brushed-Aluminum/dp/B00004SPZV/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Misto Gourmet Olive Oil Sprayer, Brushed Aluminum</a>&nbsp;:

By comparison, the Misto produces a much more forceful, even, longer lasting spray for the same number of pumps. Washing it turned out to be OK, you just fill it with water & dishwashing detergent, shake, pump & spray. Rinse, fill with clean water & spray and you're done.

There is some suggestion the Mistos don't last as long but I purchased mine 2 for $16 so I'm OK with it.

Finally, once you get all those misters, you do start to spray all your oils, flavored oils, etc... The more the merrier.

Update Dec. 2, 2012.

Bummer, was ill and cooking was too much for me for the last, gah, almost 7-8 months? I left the oils in all of the misters. What a rancid mess. It was almost solid. I soaked them in hot water and lots of Dawn dishwashing detergent, then started misting to try and wash the oil out of the spray mechanism. It was not working very well, I could still smell the oil after almost 1/2 an hour of spritzing.  Then, I thought hey, why not try using alcohol to dissolve the oil. I bet these misters are used with wine to mist that special concoction right? Worked like a charm. Just a bit of white wine cleaned all the misters right out and they are working good as new. And I got to dive back into cooking almost right away.

Prepara customer service gives much useful advice in their comment. Be sure and read it. Thank you!
4959272
Loved it but only lasted 2 years..followed directions and was very careful with it...will look for a different brand next time
1557865
I've been using this for about 2-1/2 years.  For the first year it gave a nice spray, but since then it only produces a thin stream -- no matter how thoroughly I clean the spray head.

And the grey top has always been a problem.  Because I use a sprayer so often I leave the top off except when I need to pump up the pressure.  But because of the angle of the top there's no way to set it gracefully on the counter next to the body.

And the instructions say to unpressurize it after each use.  What 's up with that?  That would be totally inconvenient, particularly since most of the time I'm only spraying for a second or to per use.  Fortunately, ignoring this instruction has not affected its ability to hold pressure.
4684207
We purchased this product on  September 22, 2014 and it works beautifully. It takes the moisture out of our bathroom. We are working on almost 2 years and it hasn't stopped working. Other than having a harder time cleaning the vents where the air/moisture comes in from dust. It is a perfect little unit. Would definitely recommend.