I have finally switched off my T1 to the T1 Plus for testing and support. I have to say the new FW and DOL2 is EXCELLENT. The GUI is very rich, clean, and looks better then most cable/sat STBs I have seen. Excellent job!
I have not tried the PVR or timeshift features (I don't think the server I am using supports timeshift). Regardless it keeps getting better and better with each update!