I've used similar, standalone services and also built my own, but I'm excited to try Mixpanels' offering because it's already integrated into the tracking.
My solution is probably 3-5 times cheaper though.
It's actually free for me (KM via appsumo and Mandrill free tier)
mixpanel is free with a small badge link back
Lifecycle emails are a great way to look, capture and trigger events for your attention and at the most appropriate time.
Site seems to be over the traffic quota. Mirror?
And we're back.
Sorry for the issue, got caught by site44's late warning.