I used 3 denim blue runners on a high traffic staircase. Only time will tell how it holds up to kids/pets/life, but it was an simple project and the rug seems to be good quality for the price. 

I used the Bottorff Dual Surface 0.33" Rug Pad on each tread for cushioning. The pattern was easy to match up for a "seamless" transition and the rug has just a tiny bit of stretch (unlike, say, a cotton runner) so it's unlikely to bunch or wrinkle over time.

I like when I can see of how others used a product in real life, so here are a few images of this rug as a stair runner.