The Edge 800 was one of my better ‘investments’ as far as cycling upgrades go. Although relatively expensive, the unit is purpose built for the job and fairly rugid and weather resistant especially with the rubber case. Maps can be expensive but the time saved by not having to stop every few minutes is a bonus.. The unit can give audio and visual direction advice depending on settings and when you get lost will point you in the right direction. Also, if and when you have a big mechanical or an accident, the unit will give you an accurate lat-long for your would be rescuers or the emergency services.