Good customer service, fair price, and an easy reliable boost controller to use. I'm a believer in simple and effective is better than expensive with a bunch of bells and whistles. very easy to set boost settings (three: off, low, and high). No spiking when set correctly. It held 24psi with sport 500s. Sometimes simple is better. Price around $200 (used) Only down side is they come from Japan and take about a couple of weeks to get. Check it out. Just my experience. E-mail me if you want more info. Hope it works out, Mark