I actually bought one of these last year for the same price.
I have to say I'm pleased with it. It hasn't let me down yet.
I use a set of Irwin multi purpose bits with it for blocks etc and it works fine. I maimly use it as a driver though.
As for the 3 batteries, I'll only find 3 useful if I'm away from a socket. The batteries are charged within the hour, so you're unlikely to be stuck if you just use 2
All bosch for me! My new 24v bosch mopnster kit arrived today which I was made up with coz now I have batteries for my site radio! Proper bargain off ebay too!