I've been using them for a few years now and was just about to leave a review. So far I haven't had any problems with them. I have found that some hard drives fit tighter than others which can cause problems when removing if the door is not handled carefully. The WD drives seem to fit best and come out fairly easily. My Seagate hard drives are very tight and must be pulled out carefully to avoid overloading and breaking the door or hard drive eject latches. The construction is okay for the most part, but I can see where the manufacturer could have made the door and lever system a bit stiffer.