I got my HP kit in '03 or '04 I can't remember. It took about a month to receive, the instructions sucked ass, I went through a few 5.0 motors getting things sorted out(my lack of turbo experience had a lot to do with this, there was to much that they expected you to know that I did not). But, I have had no durability or quality issues other than some discoloring of my ceramic coating.
Fast forward to this year. I am putting a 351 motor together and I ordered the 351 specific parts(cross over pipe and passenger manifold) to add to my 302 kit. They said it would take three weeks, it ended up taking five months. I am a big fan of their product, but I have to agree with what was said before about the customer service.
1979 Mustang coupe, EFI 393, A/A intercooled Eaton m122, 4r70w trans, Megasquirt II, T-top swapped in.
1990 Mustang, 545 BBF, C-4 with brake, ladder bars, tunnel ram with two Predator carbs, solid roller cam, 9", 390/45r15 drag radials.