I guess my two reasons for Premium is the route builder function, and the gear tracking. I've uploaded not only all my bikes, but for most of them, their components and consumables like tires. I like tracking component life. I've found it very useful for choosing the best tires for wear, predicting when I'll need to replace my chain, seeing which components fail prematurely, how long brake pads last, etc.
Pros: tracking component life, useful
