That is the one I have and it is really good. Been using it for a couple of years now and one of the high output lithium batteries lasts a while and as a charge indicator. You can buy reconditioned ones for $300. The convenience is nice.
As noted above, if you break them free by hand and do the final torque by hand, even a cordless drill with 1/2 socket adapter is helpful, although some of those little impacts with the hex fitting are even better and much lighter than the big square drive impacts.