Just wondering if anyone has experience with the three. I have used read through some RoR and used Django. They seem fairly easy to use. Is lift \"easy\" like these two are?
I'd have to say it's a bit more difficult to get started with, due to the complexities of the Java/Scala ecosystem (maven? gradle? .war files? Tomcat? Jetty? what??) and the necessity of compilation. The exception is if you have Java development experience, or especially Java web development experience, in which case I'm sure all of this stuff is an old hat to you.
Once you've gotten past that and have a workflow, it's great. Scala is a fantastic language, and lift is an engaging framework.