I have several clients on Asa**, but if I could, I would move them all over to BasicOps. BasicOps is so much cleaner in the UI and UX. I jumped in on BasicOps and it was really simple to figure out.
I'll admit that it is hard to get a client to move off of another project management platform, especially if they are using that same platform with other collaborators. I almost refunded BasicOps just because of that difficulty, but decided to keep my codes. It is worth it just on the possibility that I can get them to switch.
And any new client will go on BasicOps.