Most people think they provide superior service these days so really that just becomes the expected level.
Xpres are very good all round and can never remember a single problem. Pricing generally good accross the board. As they are a large company you might not get the continuity of speaking to the same members of staff like BMW which some customers will like. There are over half a dozen long term suppliers that I would say are trustworthy and helpful but we tend to be creatures of habit and like going back to what we know. If it ain't broke..........
Everyone is entitled to their favourite.