I stayed at St Christophers Inn Liverpool St twice - both of my visits were great, the staff was friendly and I think that I received good service for my money. It's a backpacker's hotel, meaning that rooms are shared, though I had no problems on both occasions with the others in my room. Nice showers accompanied by a good £4 breakfast as well. Friendly bartenders too. If I need a reasonably-priced place to stay overnight, I'd consider coming again.