Not great I'm afraid. AJO landing pages are not as advanced at ACS alnding pages and I've perosnally only found them useful for updating subscriptions on known profiles (it does that really well).
its not useful for having an external facing landing page that captures new signups from unknown profiles (although i do believe that is on the roadmap) and data capture and mapping is not a thing yet. also found the button to be quite limiting in that it can only perform a single funtion like 'opt into channel' or 'update subscription' but not both which created lots of unnecessary clicks.
personally I only use oanding pages for opt out or double opt in, everything else i do via web pages and http streams