TFTuned - easy to deal with, always open and honest and not trying to shirk on DT Swiss warranty items (unlike previous appointed service centres....).
Silverfish - sent me the wrong parts for my Formula brakes (granted the spares option are vast!) but have been really helpful in getting it sorted.
Zyro - honouring the Camelbak 'bak for life' warranty and giving me a full credit on a Charge450 pack that has split and was almost 3years old.
Scott UK- always giving excellent technical advice and not merely repeating 'go to your local dealer'!
Keeps it up people! Others take note : )