Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No Worry Bicycle Computer

Easy, simple to set-up. You need to tweak the calibration for your front wheel - I found the included chart not always accurate. I own 4 of those (on all my bicycles) for many years and all work OK.If you look for something basic and not-expensive (but not cheap)- go for Cateye Enduro.