My experience: I have only taken:
Alzam 1 mg (Warner Lambert), and
Xanax 1 mg (Pharmacia-Upjohn)
I like them both, although I am pretty sure I prefer the alzam. For me personally, the xanax doesn't seem to last as long. I thought perhaps it was becoming a tolerance issue, so I switched back to alzam, and they just seem to work a bit better for me. I will, however, keep with the Pharmacia-Upjohn brands or the Warner-Lambert. I have heard too many posts on here about the various generics just not working as well.