I did get the US 1200 with the "stupid deal of the day".
After returning a PRESONUS VSL 44, because of latency issues, I had no expectations of this thing actually working out for me. I thought I'd give it a go. Read install instructions, which state not to use other USB ports with it (other than mouse and keyboard), and install of the US1200 drivers prior to attaching the unit with USB to computer. Through trial and error with these I disable the wireless, Bluetooth, etc...
It installed perfectly on my MacBook Pro. Went into the system settings for the MacBook and selected the US 1200, did the same in Reaper preferences. Recorded guitar, vocal without any problems. Went back and added Bass and Harmonies, still no problems and best of all NO LATENCY. The unit is a bit dated but IT WORKS FLAWLESSLY. Thought I'd try the iPad with it, no luck there.
The U.S. 1200 is a very simple, effective, 6 channel DAW. I had seen a user having issues with drivers and cutting off and on. I was very skeptical that this would work but, it does. The sound isn't as crisp, clean as the PRESONUS, it has a slightly warmer sound. The sound is cleaner than my Stand alone/DAW, Zoom R-16. The U.S.-1200 is a nice compromise between the warm sounds of the Zoom and the Crisp sounds of the PRESONUS. I LOVE my Zoom R-16. It has been a true work horse, Swiss army knife for my projects. The USB works well, no latency. I've owned
the H4, H4n, and use the Q4 video camera. I've always loved my Zoom products and will always choose them when available, at similar prices.