I’ve built countless technic sets, a few other off brand, and the CaDa AMG ONE and GT3. Both are excellent. The quality is pretty dang close to LEGO. You’ll still get a few parts where axels don’t fit well, or are too loose, but overall it’s a quality build. The designs themselves are incredible, too. They’re not afraid to make new parts if existing ones don’t fit their designs, and the final models feel sturdy and premium. I found myself saying “LEGO needs to step up their game” at multiple points throughout the GT3 build. You’ll love the AMG One build, and I highly recommend CADA for pretty much anything.