I was initially quite pleased with this USB hub - it was cheap, compact and seemed to do the job. However, after a week or so, my USB devices would go off-line for no apparent reason. Removing the plug from the rear of my computer and re-inserting it usually did the trick. On several occasions, my computer crashed with the dreaded blue screen of death. I finally found out what the problem was - a poor connection between the USB plug and the flying lead. Now, I'm the sort of person that looks after things and wouldn't pull a plug out by pulling the cable, so it the hub hasn't been abused. So I think it's a combination of poor design and poor manufacture.