I've been using a Line 3 for about a year. I did have problems with it, but there were due specifically due to the presence of the PS Audio 300 power plant in my system (sometimes there was a significant hum from the Line power supply and it blew a fuse in my Line power supply once). When I got SF on the phone it was the first question they asked me - 'got a PS 300?'. Apparently this is a common problem. However, I blame PS Audio and not SF. Without the powerplant, it performs flawlessly. I'm very happy with the Line 3. Also, their tech support was eager to help - great support. I sent them an e-mail and their technition phoned me five minutes later to help out. One thing I'd mention, if you're looking for a balanced preamp, you may want to check out BAT as well. Best of luck.