[Users] stable ovirt

Hi everyone. I have a samoe questions. 1. Who using an oVirt in production environment? :) Is oVirt (with fedora 18 distrib) an enough stable? 2. Can I install a oVirt engine node into VM in same cluster? Or I need a dedicated physical server for engine? 3. Can I install engine together node o one host? Or it's not recomended? Thanks all