Summary: Purchased mine in 2011, influenced by its 48Hz/24bit specs, dual-mic and -phono in/output choices. It lasted 3 years with sporadic use + dust-protected when not in use. Not durable enough for me. My next try will be Alesis' i02 (identical specs and features).
Summary: I actually love the device, but its day is done. When it worked it worked great, I owned two before, each worked beautifully for two years before failing. They got really hard to find, but Amazon had them.
Summary: Still evaluating but, I use this to record from a line6 direct to the tascam's inputs. The headphones output is not very loud and the monitor mix knob is very touchy when recording over previous tracks... hard to get the mix just right sometimes....
Summary: I have owned the Tascam US 122L, (white version ) since 2004. It has shown to be compatible with all the laptops I have owned ranging from Windows XP, Vista to Windows 7. Its very PC friendly from what i can observe.
Summary: I really like this device. I'm a filmmaker and had been using a Tascam DR-100 for recording a vocalist and guitar for their recordings. I also do music video work so audio work has become a hobby. I now use Adobe Audition for my audio work (Soundtrack Pro works too).