I bought the first Combustion. I took it to Sheldon to get the action adjusted (after a cold winter and my poor upkeep

) and he APOLOGIZED for the inconvenience! When I said it wasn't his fault, he replied "yes it is, and this is why," and pointed to the Dingwall logo on the headstock. THAT is the Dedication Sheldon has to his guitars and his customers. THAT is what you get for $850! GO FOR IT!! That is a good price.
The only complaint I've heard about them is that they don't have as nice of a neck profile as Sheldon's $5000 basses.