I really wish we could see some metrics on products people 'love'. I'm working on a product that is seeing great growth (free atm), and what appears to me to b

I really wish we could see some metrics on products people 'love'. I'm working on a product that is seeing great growth (free atm), and what appears to me to be good customer engagement. When I break things, users email and let us know, time on site is good, etc. etc. At what point do you go, yup, this is something people love. Of course, I'm still making product improvements and figuring out what people will pay for.