I agree. I had a similar problem with CouchDB a while ago when I tried to write the application in CouchDB. The interface was there, but it was obvious that some of the key features hadn't been implemented yet, requiring painful and complex workarounds. I went back to technologies I knew were tried and true.

If you're interested in playing around with tech and having fun, then these technologies are great. But for business I would avoid them for now.

I'm hoping they gain some traction though.