all depends on the building, if the walls are big thick fuckers then the signal is going to be sapped to death.
we put one in at work but its an old building with massive thick walls and pc in back room, not 10 metres away got an ultra shit signal, with the same print spooler errors as well
you could try a mimo router, be a lot more expensive but gives loads more range or what often works and is cheap is getting bigger aerials for the router & the network cards/usb adapters
some of these for the adapters and even router -
http://www.wirelesspro.co.uk/store/c...roducts_id=332
or if the bloke is flush grab one of these for the router and itll boost the signal massively
http://www.wirelesspro.co.uk/store/c...roducts_id=223