I made my own boost controller setup. In cabin switch adjusts between high and low boost.
High boost is gated and set at 20psi, low boost is not gated and is set at 13psi. My boost holds rock solid at both settings and does not spike or drop across the whole rev range.
It works perfectly, is very stealth in the engine bay and cost very little to make.
Performs better than nearly anything I have seen off the shelf. Because basically I set mine up to perform exactly how I wanted it to work