We stayed in Vitoria for the Fiestas de la Blanca and could not have found a better place to stay. For the price this is the nicest hotel I have stayed at in Spain.
The hotel is new and everything has been renovated with fantastic attention to detail. The hotel staff are very friendly and helped us out with everything from travel arrangements to advice on what was going on in the town.
It is probably best to mention that during the fiesta the whole town goes completely insane and the B&B is on the main square overlooking the chaos. The hotel provided ear plugs which are pretty much essential if you want to get any sleep. I imagine during the rest of the year the place is pretty quiet; however, if you want to experience the party in August there is no better place to stay.
As mentioned by the other reviewer this is more like a boutique hotel than a B&B in terms of luxury but still with a B&B feel (so don't expect room service!). For the price however I would be surprised if there is a nicer place to stay in Vitoria which is itself a much underrated (and undervisited) city. The old town is beautiful and IMHO the party better than the more famous one in Pamplona.
