I have this device and it's absolutely bang on! I can't believe the quality for the price and how well it performs. Everything you say above I concur. Thanks for the heads up with having the phone app open for rerouting - didn't know that — and a boon! 😁👍🏼👍🏼 I've had this for over 6 months now and use it often, I since bought their (cheap) wrist heart monitor and cadence meters both of which I'm also very happy with. For just shy of £90 I have a great tracking system. Also noteworthy is how you can save a ride and use it to repeat that route later. I was taken out for a ride I didn't know by a good friend and used my device to ride it again on my own.