Happy with them
I bought a whole set a while back and I'm very happy with them. They definitely reduce the sound enough so that you could play your drums in an apartment, but you do have to be careful with the cymbals as every now and then the pad will shift a little and you might get a "clang" sound from hitting the cymbal itself. As previously mentioned, the snare wires are still quite audible when activated. You can turn them off but then the snare loses its character and feels/sounds just like the padded toms. The drums definitely lose a lot of rebound and you arent goign to find yourself doing buzz rolls around the kit, but the drums are still very playable. For the most part I play rock music and I would say that these pads work great for practicing that type of music, but I would not recommend these pads to jazz drummers or anyone else that would want to use brushes or play extremely quiet and subtle drums parts.
Despite any setbacks that result from using the pads, I still love playing my drums even with them on. Using these pads would certainly beat not playing your drums at all. However, when I use them I do listen to music while wearing a set of isolation headphones. I have found that despite minor changes in the feel of my drums, as long as I'm listening to music with some headphones on I can sometimes forget that I'm even usign the pads.