I'm testing it out and it seems pretty legit if you need a big, big key value store and don't want to wrangle redis or memcached shards.
Non-Java drivers are a bit behind, but nothing seems to have the same 95%tile latency, fast failover, SSD performance for actual read loads, and relatively easy scale out.
The biggest deficiency now is the stopwords list is not working 100% so mundane topics are creeping in. I'll have limited time to play with it in the next few days, so feel free to make some cool discoveries. :)
Non-Java drivers are a bit behind, but nothing seems to have the same 95%tile latency, fast failover, SSD performance for actual read loads, and relatively easy scale out.