A lot of Estate Agents we tried to use offered only Mon-Fri 9-5 viewings with the ocassional Saturday and were very inflexible when we said we worked Mon-Fri 9-5. Whitegates, however, immediately offered us a 5.30 viewing on whichever day we needed, which was very much appreciated. They kept us well updated with info (e.g. when the properties were available to view as we had an issue with a landlord taking the keys when they went away, also Armond let us know when he was going away and who to contact at Whitegates in the mean time) and they were very prompt in answering queries and returning calls. When we said we would like to sign for it they immediately stopped showing other people the house which made us feel more comfortable with the transaction.
One thing we thought was a bit unreasonable was the agency fee attached to the guarantors. We had to pay £110 each for agency fees (which seemed high but we accepted it), and if we had to put an extra £110 on top for any guarantors it would have been a bit much. But generally great service, very helpful and they really made it easy for us!