(Disclaimer: I'm pretty new to Go). I tried Revel out a little while ago, and found it awesome at first. It felt like it could have the potential to dramatically speed up the development of Go web apps. I like the server and hotswapping features a lot, for instance.
But at the moment unfortunately I don't think it's very mature. Support for interacting with the DB, arguably the most important part of a web application, is pretty lacking IMO for something that otherwise wants to be an end-to-end solution.
In one of the examples I noticed that all kinds of interaction with the DB was being done in the Controller, not the Model. Which just seems wrong to me (at first I thought it was a "Play" framework thing, since Revel is modeled on that, but Play uses Hibernate for an ORM in its models). Also, you'll have to roll your own support for interacting with the DB using, say, gorp: https://github.com/coopernurse/gorp
That being said, robfig seems like a really cool dude, and he was responsive on github when I needed some help. The documentation is pretty great too.
