I've been using ArangoDB for a year now and I think they are definitely on to something cool.

Having stumbled upon some really complex data a few times now, I am increasingly appreciating how amazing it is to model your data any way you need, without having to deal with the complexity of running multiple data stores.

Cool to see that I apparently didn't give up any performance to get the flexibility. :)

I'd love to see them push the geospatial capabilities a little further, but they are already pretty decent.