I don't know anyone that uses a straight bleed valve MBC anymore. Every DIY controller I've seen in the last 10 years has been ball and spring, aka Dawes. Greddy touting that they're not a bleed valve is like putting an emblem on your car that says "fuel injection".

I really like the closed loop EBCs like the Gizzmo (not that anyone is asking). But what I really wanted to perfect is the ECU controlled wastegate. The S14 and S15 ECUs have boost maps so you can give them whatever profile you want. Yes it's a major pain in the ass to reburn chips to change your boost profile, but I loved the simplicity of the not having yet another box in my dash. Add a switch somewhere to cut out the actuator signal to revert to wastegate pressure. I did have the MAP sensor working, but I'm not good enough to firmware hack it into a closed loop setup. I'd just go with a PFC if I cared that much.

See ECU controlled e-fans as well.