I've recently purchased GF and on the whole it's really good.
There's one thing that has come up for a project that is essential and that is being able to front end edit a user profile.
I.e Someone registers on the site, log's in and finds they want to change their website all via the front end.
So I need to be able to embed a form on a page that displays all / or some fields that are both standard user profile fields and custom one's. It's very often that the standard wordpress user profile page needs customising.