I have this computer and have been using it for about a month. The backlight is completely useless since the letters are not illuminated when you turn on the light. The green against the grau letters make it impossible to read at night. The Eta mode is cool in that is gives you a real time perspective on your arrival according to your speed in real time. This probally seems useless to most but its nice on my 60 mile trek on the weekends. The other modes are easy to access with push down face. The only thing I have not figured out is to have at least two manually entered distances. This would allow me to have it setup for the week days with one and saturday with the other. The only way to do this is to re-enter a mileage so that the computer can estimate the Eta correctly. If anyone else knows different then please let me know how.