TSf is, if I understand correctly just released, so the best source of info might be youtube. I watched a few demo's
and reviews of it there. It looks pretty cool, but the $17 price is quite alot to swallow.
I have used SPB's shell on my maxx and some other devices. It's nice, but I had a few to many force closes and reboots of the ui. It's loaded with eye candy, uses more RAM than anything else I've ever used for a launcher, but hind sight being 20/20 I'd prefer to have my $15 back and I no longer care to use it. It is a shame the market won't give longer trials. 15 min is quite the joke for something like this.
My opinion of both shells but having only used one is , if you like eye candy stuff then you'll probably love it. I'll stick with Zeam. Quick, never FC's and very small footprint.