Looks good to me. My Tascam US-122 is roughly the same configuration - 2 audio in + 2 out - but I need to use external limiting when recording hotter signals. Yours has a built-in limiter.
If it's serving you well, stick with it unless you really need more inputs or outputs. USB 1.1 powered two-channel interfaces seem to drive the computer experts here insane, but mine does everything I want it to do...