I got a set for my 77 this winter when I was doing my resto. I have a fiberglass tub, you can see in the pic that it doesn't sit very well on the passenger side of the tranny hump. I don't believe that is the fault of the mat, the tranny hump shape was slighty different from stock on that side. I'm hoping that will get better this summer when it gets hot?
As far as the quality, ok I guess. I wasn't blown away or anything when I opened the box and fit them in there, but I would probably buy another set again. There fairly basic, heavy PVC type mat with a felt type substance on the back side, a heavy fabric/vinyl piece folded over the edges and sewn on. They are molded, but didn't seem like they were molded as good as the pics on there website.
The pre-78 set is $200, I noticed 79+'s are $350, seems like a big difference, but I imagine there's more product used in those.
Matt