Easy to install and set up. Currently using on my road bike to verify some of my routes distances. The GPS readings appear to run about 1% lower than the speed sensor. (Error rates may be higher on heavily shaded routes.) But, after riding 100 miles, that means the GPS will only say 99! Every now and then I glance down and notice the speed is twice as high as my actual speed for a second or 2, so I guess neither is 100% accurate. After checking a few more route, I'll move it to my MTB, where error rates on shady trail are much higher.

Good product. I had another speed sensor that my bike computer would lose connection with every so often, but this one works great.

Easily connects to the Rider S500. No issues