It's too bad to see a shop that had such good ratings go downhill so quickly. I placed an order (#295) for a premod with CMS in July after reading a ton of positive feedback here. I had expected that things would take a few weeks, so I didn't bother them with questions about status and such. However, the delat turned into a month, and then almost two. Emails were only sporadically replied to, with claims that thei rmailserver was acting up. Still, the lack of any sort of status updates from a shop are very disconcerting. After 2 months, little feedback, and no XBox, I initiated a chargeback with my credit card company, which appears to have been successful.
I then placed an order with BMMods and had a box in a week - a whole different level of customer support there. So, my advice? CMS may be good again once they get their act together, but for now, it's a risky thing to do business with them. The feedback here shows what you may wind up getting yourself into..