The group I run with might question them, but if I'll just make sure I show all of what you mentioned and they should be fine with all that.Exactly. Probably took 30 minutes to do the install total... and now that the two outside attachment spots are in place (attached to the OEM belt bolts on the drivers side front and rear) it literally takes under a minute to put the harnesses in and take them out. The thing that takes the longest is feeding the belts through the harness holes in the seat back. You don't remove the stock belts at all.
Also cool... you really don't see any evidence of them when they are out. The rear attachment point tucks into the rear seats so it's hidden and the front one is only visible by a couple inches. If I had black instead of red I doubt you'd see it at all. As it is, you gotta look for it.
And again... they actually are approved by the DOT, TUV, AND are legal to run in NASA and SCCA events. NASA seems to be the most stringent... here's from their rules:
The Schroth belts specifically say, on the belt, that they meet FMVSS 209 and they specifically say "only for use in Subaru WRX/STi models".
I'm imagining that I'll be questioned about them at tech... but I plan on printing out that section of the rules and I think it should be all good.
As far as functionality, I love them. I wouldn't want to run them on the street as they hold you VERY firmly... but on the one Time Attack I've done with them so far they were amazing.
I can't tell from your pictures, did you get the "pro" model with the camlock and AST (anti-submarine tech.) or the standard model? I'm still a little leery of how the AST works, but I saw the video and it sure does work. Schroth certainly knows their stuff so I should probably just chalk it up to them having done the research and designing something that works.