Been using 0.9 for a few months now and been pretty happy with it. Though I'm not really looking forward to figuring out how to move from telegraf 0.2 to 0.10, since that had some breaking changes.

I do love the simplicity of influx+telegraf, kapacitor also looks cool. Chronograf seems like a bad version of grafana still... maybe in the future if its FOSS and somehow manages to be better than grafana I'd use it.