I don't know if anyone is still watching this thread, but I had to say it.
I was having some major problems in the beginning that I couldn't figure out, but I finally realized it was entirely due to the Roland TMC6 being set up improperly (that and some poorly placed drum triggers
The InTime program is really solid. I've only had it whack out on me once, and that was when I was first setting it up and tweaking all the parameters to get it working right...
Now it follows the drummers tempo like a dream...
The master clock in InTime stayed reliably around the starting tempo (with an occasional minor fluctuation of 1 or 2 bpm to adjust for mistakes the drummer was making) and when we tried to speed it up or slow it down it followed perfectly (once we'd adjusted the tracking bias appropriately).
So far we've been trying it out with the guitarist in the band playing the drums, and he's not exactly a professional drummer (he's only picked up the drums for a little over a week now
It's really incredible.
EVERYONE who is remotely interested in the possibilities of this approach NEEDS to check out this program... Seriously.