Over the years I've used waders by Orvis, Simms, LLBean, Converse, Red Ball, and several no-name brands.
For the past dozen years I've been mostly using Orvis with no problems. Their Tailwater wader with the built in boot has to be the best wader I've ever used. Their Silver Label waders just might be the most comfortable wader I ever wore. They also have a decent warranty and repair service. I did try a pair of Simms Guide Weight waders five or seven years ago. Leaked like a strainer from day one. I still have them to remind me never to buy another pair of Simms again. But at $700 for a pair of G4's I doubt that will happen anyway.
Keep in mind that sooner or later all waders will develop a leak from one thing or another. Buy the best you can afford that are the most comfortable to you.
If you play in the water, you have to expect to get wet.
Joe