Yeah, I read that guy's rant and I'm sure there's some truth to it. It seems to me that it's a case where "people don't quit companies, they quit managers."
Despite their relative inaccuracy and liklihood to fail, Prosport gauges are still an option if you don't want to spend an obscene amount of money on gauges. I got mine for looks more than monitoring anyway, so I'm just happy with how well they match the stock WRX dash gauges. One day, my boost gauge stopped working and I thought the sensor failed, but it turns out it was the gauge itself, so I did have to replace that once. Fortunately, everything was already wired, so I just had to unclip a few clips and pop the new one in so it was a pretty easy fix. Other than that, they've worked for over a year and 20k+ miles.
I also have the Premium Series (Peak/Warning) for all three if that makes any difference.
I agree, Defi gauges are far superior to Prosports, but the difference will cost you.