Love my mr tuffys. But I also enjoyed my bontrager hardcases I had on last year. Just didn't want to buy 80 more dollars worth of tires for a brand new bike when I could just pay 20 and get roughly the same flat protection.
Having said that, I don't really like the tioga city grippers I have on right now after 400 miles and next spring when the nokia studs come off I will probably try the highly recommended SMPs then.
Locally, the people I have talked to who hate tire liners have installed them themselves, those who like tire liners had a professional do the install.