Thanks guys. They're pretty good overall. They do need some tweaking, though. Some of the letters are too small and don't fill in the outlines. I've been in contact with Tredwear who I have to say is very receptive to my concerns (and a big Ford GT fan!) and he's going to send me some replacements for the more egregious ones. Since I'm the 'guinea pig' for the GT and these tires, there's a bit a trial and error involved.
They look good from afar, but up close, the flaws become evident. As far as durability, I put almost 100 miles on the car today, up to about 100mph (closed course
), and they're all still there.
I'll update here once I can get the replacement letters.