I love Couch straps. I have about 6 or 7 of them at last count. Most are colour-coordinated "Racer X" straps. Here's a photo stolen from another board member, but I have this exact strap on my TVL (it's a vintage Cadillac vinyl from their hardtops that matches the Oxblood paint perfectly):
I have a red/white one on my Bo Diddley, a blue/white one on my blue Jag, etc, etc.
I also have one of their Artist Series straps that my wife (then my girlfriend) got me after I spent two years hanging out with the pigeons in my local park when I was stuck in downtown Toronto for school (I'm a huge nature guy and those pigeons were the only wildlife for miles...):
Anyway, Couch straps are really well-made, really durable, and leather-free. Haven't bought anything else for years and years at this point.