Naw, you really don't want one. I played around with one for a while when I first got my car, and they are a serious pain with the climate here. Every day I had to tweak it because my boost level would change with the temperature. Fall and Winter time were scary, it would over boost dangerously high in the cold air. When you're on a road trip you can't always just pull over and pop the hood and adjust it, so then you basically end up with less boost than stock because you have to baby it. I sold it on ebay and bought the EcuTek tune from PDX, and have never been so happy to part with an "upgrade" in my life.
In the long run, I think the MBC will end up costing you more too - rebuilt engines aren't cheap.