My experience with CC has always been positive. Yes, S&H can be high, but I never order just 1 or 2 items, so the S&H becomes reasonable. I figure CC S&H normally represents approximately 10% of my total order; sales tax in MD is 6% so the extra 4% is not really that bad. Shipping times are a bit long to the east coast, usually about 1 week to 10 days, no big deal, just a little bit of patience is all that is required. I have always received an invoice within a few days of placing my order.
I believe CC is primarily a government contract filling company, so the retail side of the business is a bonus both for CC and us as customers as many of items are hard to find (many items are government over runs).
Pete