I booked a land tour package with Aerlingus (car plus B&Bs), and Ross House is one of the places you can use with your vouchers.
Unfortunately, when we arrived in Shannon (after spending some time in London) my vouchers were missing. Our helpful and lovely hosts helped to salvage the situation by reprinting the vouchers after they had been resent via e-mail, and then calling the central B&B office who okayed the "nonofficial" vouchers. That office in turn notified everyone we had reserved with otherwise the replacement vouchers would not have been accepted.
Ross House is within walking distance from downtown Galway and serves a good breakfast. The only negative in our experience was finding the place which took us about an hour.