I have experience with Lian Li, Corsair, and Cooler Master cases but I have never owned a CaseLabs case before. The issue I have had with Lian li cases is that although they are nicely designed, they use thin aluminum for the main chassis and is IMHO inferior to the quality of the Silverstone TJ11. Likewise, I was not happy with the quality of the Corsair and Coolermaster cases I've used compared to the TJ11.
I have seen just about every case you can imagine, IMHO the CL cases are without question the best case you can get and, without question, the most flexible (in terms of configuration), the Al construction is second to none, they use thicker Al and higher quality alloys of aluminum and the powder coating finish is 100% durable.
The cases are truly well designed for the enthusiast modder as well, the removable MB tray is excellent, and the snap on panels are simply amazing -- working inside one of these cases is extraordinarily easy. In terms of quality that is something you simply do not need to worry about, the quality is there. What you need to decide is a) what are your needs and does CL offer the case and accessories that can meet those needs and b) is it within your budget/scope. There is only one other boutique custom case maker that I am familiar with, MountainMods -- and though I think their cases are great, the CL cases are better designed and present a cleaner appearance. CL is going to be 2-3X more expensive than your stock, typical case maker (Silverstone, Corsair, etc) and modestly more expensive than MountainMod -- but that expense is well worth it in my opinion -- I will never use another case again.