URL:

• http://andrewchenblog.com/2008/09/08/how-to-measure-if-users-love-your-product-using-cohorts-and-revisit-rates/

Comments:

• Great blog post describing the metrics you can use to know if your user really love your product/service.  It focuses on tracking user retention metrics to create dedicated and repeat users by acting on them in specific ways.

Start-ups who found this useful:

• uberVU