Just an example: Procedurals are supporter, IR isn’t, network rendering is not really there yet I think, no dome light I think, stuff like that. There hasn’t been movement in the project for quite some time, maybe that will change with Cycles infrastructure being in trunk now. You have to realise the exporter is oss, so it is what it is and it may very well stay like it is now forever.
If you are of the type that always thinks he needs the latest feature to even start working on something (I know I am/was guilty of that) then you probably won’t be happy. If you need a good quality production renderer for animations without all the bells and whistles (which VRay has but aren’t exposed) then go for it. But everything I personally need is there.
I would say you get the basics of VRay, fast GI, excellent image quality, filtering, antialiasing… The integration is robust and production ready but doesn’t cover all of the advanced features.
