I was using menuhax + ReiNand before I bit the bullet with A9LH + AuReiNand. With menuhax, sometimes the console didn't boot properly and I had to reinsert the mSD to get it to work. I don't have that problem with A9LH (at least so far).
In terms of the process of installing A9LH, it was a lengthy, but straightforward, process. Bricking is almost impossible if you follow the instructions carefully.