They are about the fastest custom shop around. DanB and I had a similar experience with them at the beginning of the year. They are not necessarily the cheapest around, but the work is done right and it is done fast. I guess that just prove that you get what you pay for?
I think I remember seeing one custom shop offer three types of service: fast, cheap and good. They said that they were willing to give you any two in combination - you pick which two.
SSK comes close to giving you all three.