Hey I might be the single most experienced installer of this thing now outside of Phunk himself, I've done two of them
(Well, I had a lot of help both times, from a local friend on mine and then DR_ did half his own work on his as well).
Loving mine so far. With the rear interior all stripped out you can hear it all the time, and then it gets really noisy once you get well under half a tank and there's not a bunch of fuel immersing it to drown it out. I assume that's normal, but I thought I'd mention it in case Phunk says "No you shouldn't hear anything, it's killing itself!". I don't mind it on my stripped down car, and I bet the interior stuff muffles most of it on normally-equipped cars.
I don't think I came back to mention it in this thread, but I did put the thing through its paces (at my level of driving, anyways!) at Texas World Speedway a few weekends ago, and it held up beautifully. Fuel gauge works correctly, nothing leaking, and I only filled up once per day in the morning. Ran down to just under 1/4 tank by the end of the last session each day, no hiccups. Youtube link to my last session on that Sunday. I was under 1/4 tank when I came in from this run:
http://www.youtube.com/watch?v=d2-PuW8yy58