I have been using Cateye speed/cadence/heart rate monitors for years. This is by far the best item i have purchased. I am usually conscious that such items have numerous caperbilities and various functions that are surplus to requirements and simply not needed. This usually makes such products cumbersome and difficult to get to grips with. However the Garmin Edge 800, whilst still has some information which only the hardy of nerds will find useful, is extremely easy to set up, modify and use. I now cant get on a bike without it. I dont quite understand the need for a separate speed sensor (which came with it). However without that, it is ever so simple to transfer it to other bikes. I can use it with my racing bike, training bike or mountain bike simply by clicking it into the locking device on each. No messing around with moving a separate speed sensor or buying additional components. It is pricy but well worth it. I purchased the map produce (City Centre not Ordancee survey)and that too is excellent. the range of options will always ensure you have something to take your mind of the pain in your legs!