Looks like it has potential and is exciting until you read the "Limitations" section
I am very glad that if anyone can help me. Many things to do but I have not enough time.
"Join not supported Subselects not supported 'group by' not supported"
At that point you might as well be using MongoDB or what have you.
I am the only guy to develop Mixer just for fun with little time, and have to improve it step by step. Any help is welcome.
Btw, I have not used MongoDB, I will try to see it later.