I use it and love it. It works really well and has never caused any problems. I would recommend 2 things to someone considering one, the first being to buy one (well worth the money), the second recommendation is when you get it, open it up with a screwdriver, and take out the speaker that's inside lol.
The only bad thing I can say about it is that when it kicks on it makes this really really loud buzzing sound that is as loud as the smoke detectors in the house. Takes about 5 minutes to open it up and disable the speaker though.