Oh cool, a proprietary system that'll be orphaned within a few years, with limited selection. Sign me up!
The price for the base kit compared to the price of a LiIon battery from Dewalt, Makita or Milwaukee alone scares me a little. The jigsaw, trim saw and oscillating tool sound cool (Makita's LXT jigsaw is over $200 for a bare tool!) but I wouldn't have high hopes for a $30 jigsaw mechanism or $40 oscillating tool. Aside from that, there's still a buncha tools I'd want to have that they don't have, not to mention I'd never want to have to swap parts to go from a drill to an impact driver.
Meh, buying the hammerdrill piece, impact driver piece, and a 2nd battery puts you close to $300. You could buy a real LiIon kit with real 3aH batteries for about that, and be able to find tools and batteries years down the road... and not have to stop and change "heads" to go from drilling pilot holes to driving screws.