I ve been using one for several weeks now and just picked up another one for job sites.
I can't comment on the battery life yet since almost every time we used it, it was not being used all day. Dust collection is impressive with the bag (very close to having it hooked to CT). The saw feels well balanced with the added batteries I actually prefer the TSC over my TS for the way it feels. This might be just me but i felt that it had less of a tendency to tip when i was making bevel cuts even tho in theory its hard to believe.
If you will be using it in the shop all the time, i would suggest going with the TS instead of TSC but if you need to set up for few quick cuts, trimming doors, fillers etc remotely then go with the TSC. I love the fact that i can set up in my trailer on an mft between 1-2 minutes for a quick cut with the cordless . Time saved for me is priceless.