Soft top replacement is big business, or there wouldn't be that many manufactures out there...
I have replaced my front windows several times due to zipper problems and one thief who was too stupid to try the doors first before cutting the window.
I have had chitty (smitty) brand last a year at most and die a horrible death because the zipper quality just isn't there. Best top replacement windows lasted the longest and would still be on both windows if it wasn't for stupid people...(see before mentioned thief). I still have the passenger window best top replacement window, its been on the for over 5 years now and still works great. I got lucky and received a club brothers never used full soft top for 100$ so I cant tell you personally how the full replace a top are but out here in the southwest no one buys chitty, pavement failure, or rampage. two are running the RR trek top, but most go with best top for fit and quality. The Arizona desert is brutal on them and they last. And with over 3000 active members that's a good recommendation.