Love me some TTS. This is a really good synth and yep, great sounds.
As a note... the overhead is low.... as PG mentioned.
I heard a song years ago in the cakewalk music forums that was a classical cue for a movie. It was totally, 100% done with TTS and it's default patches. ( not even a sampler ) The creator of this song had 16 unique instances of TTS... one in each of 16 different tracks. AND... each instance was running 16 unique channels with violins, cellos, percussion, horns of different sorts, and all of the orchestral instruments. For a total of 256 different tracks. It ran flawlessly in his computer. And most impressively, it sounded really, really good. I'd have never known it was totally TTS if he hadn't told us.
Yep... it's a polyphonic synth that can run 16 channels of midi with a different instrument and source midi track for each channel. Way cool!
I have a tutorial of sorts on my website that can get you started with the poly aspects of TTS. I used to use this a lot back in my early days.
http://herbhartley.com/hh2_edited_slimmer_005.htm scroll down to ADVANCED TTS set up and operation.
Get it if you like a good synth and use it for the default player in BB & RB. You won't regret it.