My neighbor had an issue with a seam on his Bestop top. Quadratec sent him a new top (minus the windows) and told him to keep the old top. I've never found a good alternative to Bestop.
p.s.
@williambmac had issues with his Mastertop twill LJ tops.
My take on all this shit. The Mastertop Twill for my LJ fit 10X's better and looked a lot nicer than my Trektop. The problem was that is was noisy A/F on the highway. So.... after 3 attempts/exchanges with QT, I exchanged it for a Trektop.
The Trektop fit like shit and leaked water right above my drivers door. The rear window had a huge wrinkle along the top of it.
The side windows were loose and would pull out of the tub channel.
I contacted BT customer service (Shawna) and sent pics of everything. Shawna was great to deal with, and sent me out a new replacement top.
That was in November/December 2021, so i didn't have a chance to install the replacement due to cold weather.
This past Friday it was 73 degrees and sunny so out came the new top. I let it bake in the sun for a while and installed it.
Unfortunately the fit is about the same, loose on the sides and tight/wrinkles across the back window.
If I could do it all over again, I would just keep the Mastertop and come up with some type of solution to cut down on the flapping.
I like the look of the twill.
On a side note, my brother installed a Trektop on his 2013 JK years ago that fit perfect. He just replaced it due to age/dry rotting, and it fits like shit.