Normally I use H&R block, but this year am switching to TT with the hope it does foreign tax carryover while still allowing e-file (H&R block does the carryover, but have to mail it).
I've done my first simple return (for relative), and I imported the old H&R block 1040 pdf return (had to resave it as 1040 and not 1040R).
Then picked full interview.
The full interview was pretty exhaustive which was good, but had a few quirky things, mostly how to add another stock sale (didn't import) that I figured out.
It also asked lots of questions including did person have Canadian RRSP / RRIF income, which I've never seen H&R block address.
Overall, I'd say the interface was smoother and just seemed to be better designed software (popping up help). I thought to myself, "this is why some people pay double the H&R block price."