I had it for a year and just canceled. I did not think it was worth it. I really only want to compare my times to myself and not need to compare based on age or weight. I also do not use any of the other premium features. Heatmaps do not help me and I am not seriously training so the goal setting and instant updates on my cell are a waste.
Received a "code" from a friend to upgrade to premium for a year last year and the subscription ends this month on the 28th. Really did not see a use for it since I do not utilize the premium features. Going back to the freebie subscription after the 28th.
So far I've had no problems with the free version, and see no need to upgrade for what I use it for. I'm just occasionally tracking my improvements on a couple of regular loops that I ride, so free is good.
Salsa El Mariachi 29er
Giant CFR Team Road Bike
Kona Jake the Snake
'05 Ducati 749