Quoting mitsuturbo:
I've run HKS, Greddy, and Blitz EBCs. I liked the HKS EVC EZ. The HKS EVC IV sucked balls, and was unreliable. The Greddy profecs (a, b and b2) are absolutely sh*t. Worse than the EVC IV, IMO.
I've been running the Blitz SBC-iD for a very long time now, and i absolutely love the thing. Before that i had the Dual SBC spec R, and it was amazing as well. NEVER had creep, spike, or any boost issues with the Blitz units, and they're VERY easy to dial in. The profecs and EVC4 are a total pain in the ass to deal with. Every MBC i've ever had the displeasure of dealing with, be it on my car, or someone else's has shown itself to allow either boost spikes, or slower boost curves than the EBCs. MBCs work well for a lot of people, but when comparing them to a quality EBC, they're just not the same.
The nice thing about good EBCs is that they ARE a gauge. Among other reasons, I run the SBC-iD because it shows the boost curve, digital peak and current boost, in psi or metric. Also, it can display oil and fuel pressure, as well as voltage. (with appropriate sensors and harness) It will show current and peak values for these things as well. So, basically, the way i have mine set up, it's 4 gauges in one. Boost, OP, FP, and voltage. I've mounted it in my visor, along with the power meter.
Can you give more info on why you think the hks evc 4 is unreliable. I had two of them and they worked great. They are very expensive though and a bit more complex than most other boost controllers. I happened to like the vacuum display and I felt the quality of the hks unit was excellent.
The one thing bad about all electric boost controllers is yrying to get a air tight seal with a rubber hose on the plastic vacuum ports that protrude from the stepper device. If you are running a lot of boost the potential for air leaks is higher. The nice thing about manual controllers is you can run braided lines to them, such as the halman unit.