My experience and the experience of the instructors and people around me is 100% opposite of your experience. This isn't to say that there is anything wrong with AL at all. In fact, AL regulators will be 5th place after SP, Atomic, Zeagle and Apeks for me.
Fair enough. There are enough brands to go around. Personally, I will stand on my 17 years of first-hand experience owning Aqua Lung regulators. All of the other regulators I've ever owned are now gone. All I own and dive are Aqua Lung. I find them reliable with amazing performance and service & parts available just about anywhere. YMMV.
When it comes to regulators, there are a group of about 7-8 manufacturers that get the job done incredibly well. Pick one and go with it. My choice was and remains Aqua Lung.