Good. Needs to be a little more sensitive!
920815
It can be tough to get the bag in there far enough to start the suction process. keep your hands in the middle, curl down on bag, don't over fill, and push more in the center with your fingers on top of the bag. it's easier the second time for some reason. practice with an empty bag sealing one end several times first. DONT OVER FILL!!!!
3975075
The review of these really depends on what you're using them for... I'm mixed because they're really easy to install, work well, and add a very cheap but nice touch of home security. Especially when you consider the hundreds of dollars and subscription fees from other options, these are fantastic.

However, they are overly sensitive and not very loud. I was most excited to put them on our large sliding glass door, but it takes some real effort to close it without setting these off. Also, they're just a little too wide to open and close the door over on the non-opening side.

Finally, they're quiet... if you're home you will be alerted reasonably well, but don't expect any neighbors or passing police to hear or do anything. The alarm shuts off and stays off after ringing for 30 seconds. So just know what you're getting and why you're getting it.
4494568
Works better than expected, but a little uncomfortable.  Definately eliminates noise around me, but the plugs are a little uncomfortable.  Not bad enough that I won't use them, but I sure hope I can get use to it so I can use them even more often!
3080418
If it cost less it would be even better! Really wish it could be sound sensitive also. I really enjoy it though.
4542125
These are excellent Bluetooth headphones.  There is one real problem.  The microphone is so sensitive that it picks up every bit of ambient noise to the point that people I am talking to are disturbed by the noise.  Also, I've found that the headset still transmits when my phone is muted, but this may actually be a problem with the phone rather than the headset.  It may also be a combination of the sensitivity of the mic and possibly some feedback is occurring.
1020639
the mouse actually works and connects easily to Macs or Dells.  but it's a bit too sensitive . I know some gamers like that but I don't .  I use my computer for work and it could get annoying
3774773
Very good product, just not as sensitive as I would like. It also came with a couple fibers that came loose of the overall weave. Did not affect the pen just a cosmetic problem.
4398294
I like the collar but it is very sensitive.  When you turn it on, the collar goes off scaring my dog and usually hitting me with the spray.  It helps with the barking but does not stop it all together.  It is very heavy on a smaller dog, also I am not sure if we put the collar together right or not but it keeps loosening up  so I have to tighten every day.
All in all this is a decent collar, just wish I didn't get sprayed every time I turn it on
504326
The sound activation was no doubt a cool feature but it may not be set to be sensitive enough. I gifted this to my nana and she gives it a round of applause to get it going. Slightly disappointing but I like it.
3042071
It is really sensitive. I live in an older house and when I step on the floor board down the hall it sets it off. Still though, my cats are staying away from the bedroom doors. Yay!
3409217
Worked good - instructions weren't very clear. It doesn't tell you how many settings there are. But if you push the minus until it stops beeping you are at the lowest sensitivity. I think there are like 7 settings so you can press the plus button 7 times and you will be at the highest sensitivity.
4330903
The vibration and alarm features work quite well.  However, the clip going over the ear needs to be adjustable as does the point at which the alarm or vibration comes on.  The alarm would come on too quickly when I moved my head.  I had to hold my head up higher than I'm used to in order to keep it from coming on and my neck tired too quickly.  Needs an adjustment point.
662511
The collar works great to stop my dogs from barking non stop and has even improved other behavior issues. The only problem I have with it is that the collar is super sensitive. It will go off if they shake their heads, if a door is slammed shut or if another loud noise occurs. SO, please, only use it in a situation where barking will be an issue and remember to take it off otherwise. I do recommend this product as long as you remember what you bought it for and use it for only that issue.
3272347
4.5 stars.  I'd round up to 5 if the sensor was less sensitive... it's annoying that often times the light comes on during the day if the light from the window isn't bright enough.  I'd prefer if these only came on when it was actually dark in the room, but a shadow will trigger them to come on.  Other than that, these are great.
3118515
Good light and the white lamp on the side comes in handy too.  The switch is very sensitive though, if that could be improved it would get 5 stars.
2699663
We have it placed on the ceiling of the kitchen which allows it to alarm at the slightest whiff of browning toast or a hot frying pan.  However, It is relatively easy to quiet.  It would be nice if the sensitivity was adjustable.  It's been in use about three months.
2809748
This pickup is pretty good at lower volumes. But it becomes a feedback nightmare at higher volume. The pickup is very, over sensitive.

Also, spend some time where exactly you place the pickup, it makes a big difference! Try to put it near a solid part of the instrument so it does not pickup so much and make the cound like the bottom of a cave or something.