I replaced it and it worked better, but over time I feel like they might ...
928125
I've used these for projects.  I have some that are starting to not hold as well.  I replaced it and it worked better, but over time I feel like they might pop out again like the first one.  I'm not sure if there is weight limit or what lbs. they are tested to or if the pieces just didn't fit together correctly.
3478792
The back piece apparently got slightly warped at some point, as I was only able to screw in three of the four screws that connect it to the rest of the chair. I put zip ties through that hole, which probably isn't really doing much of anything, but it made me feel better. I've now been using it regularly for several months and it still feels plenty sturdy, so I guess it wasn't that big a deal. Otherwise, I'm very fond of this model.
2008899
I originally bought their system about 2 years ago, but in the second year it became difficult to adjust the sensor - the swivel cover seized up.
This is a replacement and worked well this year. I hope it lasts longer than the first one.
3439255
I had a pair of these I bought about 4 years ago and the new version does not seem to be made quite as well. They are feeling better than when I got them, but not perfect like the others.
3138259
A great product with needed improvements making it better than original product
1372758
This didn't last a full year but the company did replace it.
1077213
Kind off It works and don't work feels that way got it for it to go little fast and clean up too, Im not a Pro but some times I feel like its ok .
3760020
it was hard to tell how worn the old one was until I used the new one.  Do make sure to transfer one wire at a time to the new timer.
3506263
Following a problem I had with my the quality of this case I was offered a replacement to a different model, this worked out much better
4393272
It didn't work the first time I tried but think I wasn't reading the directions correctly as when I tried it again a few days later it worked perfectly..
2323507
Sometimes is seems to work, other times I wonder if it's doing anything at all.
3243510
I have mixed feelings about this product.. I can't tell if it's really working- it felt like it did for some time and now, not so much. I don't think it's been a month since we replaced it .. I don't think I'll purchase again.
538678
My original one that I purchased had a few problems, but once I got the free replacement, all went well
4548253
It eventually become as loosely as the one I was trying to replace.  However, to be fair, it was not a "new" purchase after all.
2221260
works fine now, but I don't know how sturdy it will turn out to be
1501774
kinda loud, but better than the one it replaced
2219462
Appears to be of higher quality than the original it replaced.