HBase and Rails

I'm considering using HBase within Rails. I'd appreciate feedback from
those that are using HBase on the following:

1. Are you using an ORM?
a. If yes, which one and why?
b. If no, how are you interacting with HBase?

2. Were there any complications/obstacles in developing with HBase as
the database?

3. Was it difficult moving from development/testing to production?