Thoughts:
As an experiment, it went pretty well -- but I would definitely want to do it over with the things I learned along the way.
Cutting the rubber with a razor is easy, but trying to get all the cuts, curves, and details right using old floormats as a reference was a learning process -- and that means I'll need to do it again to get it really, really right. The area around the pedals was pretty tricky, and I will redo it with a different approach if I do it again to get it right. My biggest mistake was around the gas pedal and the governor. This has to be right or you get binding against the pedal rod.
So I'd count on doing it twice, doubling my $45.60 outlay for materials.
Still not sure I like them in the car, either. The car feels cheaper inside in a bad (though not overwhelming) way. It's pretty subtle (took my art director several tries to figure out what changed, but once he got it, he thought it seemed like a bit of a downgrade).
I'm gonna live with them for a while and decide if I like 'em -- but it might be that you have to go whole hog GT inside the car to get the mats to look right. If so, I have some decisions to make. I like the interior in my car, so not sure if I want to do GT door panels (have the parts, but speaker placement -- or deletion? -- plus no more locking from the inside has given me pause), radio delete, backpad delete, headrest delete, racing belts, carpet delete (maybe), etc.
There's one other thing for those of you considering this: noise and a cheap feeling under foot. Cars get carpeting for a reason... Not sure it's a big deal yet, but my feet sure make funny, hollow sounds now...
Hope this is helpful info for someone!
pete