I like it very much and would have considered it, but DH couldn't for family reasons. I dislike Allison - unnecessarily complicated, and I think I prefer Alice. Usually that's the case; sometimes not.
I think that Alison is a very wonderful name! I’d use it, if I were able to. Ali is a wonderful nickname, as well. I do prefer the Allison spelling over the Alison spelling. I also prefer the look of Ally to Ali.