I got to drive the car yesterday, and damn it feels good! With the transmission blueprinted, you can't just 'wander' into gear - you've got to go left, then straight up or you won't engage 1st gear, for instance!
The transmission feels really nice. I'd guestimate 150 miles or so on it, and as the miles add up, the transmission is getting smoother and smoother. I just drove normally through stop and go traffic. Shifting around 2500-2600 rpm in each gear and everything feels great.
Also just got my confirmation email - the first 5th gear sets will be en route to me this afternoon. Hopefully, I have them before this weekend so I can get them out for cryo treatment!
We've had zero problems with the new 5th gear so far. I can't wait to go get some GPS verified readings (we spent all yesterday afternoon/evening doing MASSIVE work on the Ion Redline for Laura)