I've got several hundred street miles on my Jerico install, and it would not be any different than driving a face plated TL.
My experience is, and I have a high tolerance for what other people would consider 'not streetable', that it is not a huge deal if you mainly drive in sparse or little traffic. There are a few different ways of shifting; double clutching, RPM matching, or just hard shifting like you'd do if you were racing it. I prefer double clutching or RPM matching, but I drive on either deserted roads or roads that have very little traffic. My one-horse town only has 3 stoplights, so not a big deal.
BUT, if you drive in heavily populated areas, or areas with heavy traffic, I don't think I'd be so quick to want to drive it. People are very impatient these days, and you'll have a lot of unhappy people following you, especially in stop and go traffic. I can't even count how many times I've about been rear-ended by tailgaters when I go to shift, and not just in the Mach, but in all my stick shift vehicles. It's nice to get the finger when your just driving normally....in front of people who are apparently trying to escape the apocalypse.
I plan on driving my Mach this year in Drag Week, so I say go for it if you have a high tolerance for the unacceptable