I love my garmin edge 500. It's by far the best computer available nowadays. Now, it also should improve in some aspects for future versions. Altitude points detected by gps not always works properly and in general processor seems kinda slow. When following a track it gets stacks for a few moments sometimes, redrawing the whole track when you need it more... Firmware updates appear every now and then, which means they are solving some issues and that's really good. Still, future garmin edge 600, when ever comes to market will be the killer computer.
I will admit so far im very happy with the garmin bar issues found. Spend today getting it setup i.e. all working before properly using the zip ties. Also filed down part of the wheel magnet and used tec 7 to glue to spoke, handy thing is it is waterproof but i will come off. I wish garmin would allow for the arm to be position on left and right hand side thus so the computer could be mounted underneath i.e. my old tarmac is closer to the spoke than the sl3 which means i have to raise the arm unlike the arm snug on the sl3 tight against the frame. Also found when the arm is raised it picks up the wheel magnet better than when the arm is lowered.
Then i went out on a short spin to test it, found it better to read than other computers mounted on the bars as your shades can block out part of the screen which the garmin while be shown in all view but will depend on your height and stem length. I also tested in the drops and did not noticed any major difference bar tilting the head a bit more to read the computer, if anything i think i prefair stem mounted to handle bar mounted computer.
I did find locating a satellite for myself because of where i lived took some time roughly 40 secs, no biggy but i was in the house when i turned it on, i think it is around 30secs when you are outdoors. I am still debating with satellite to use, the most accurate for where i live than the normal one selected as standard that picks up your location as chose one for you.
Will try out different screens setup that garmin offers to suit what information i want to know but i do like the time in cycle and actual current time big benefit for myself as other computers you had to flick between screens. I never got any altitude readings but i have to look into setting it up, dunno if i had a setting turned out or because i was at mostly the same height.
I did find the speed more accurate with cadence kit and satellite using maths to give a answer, it does kick in straight away. I am not sure if the device turns off automatically after a period of time but i just used power off before having a look at my ride information. still have to upload on the net and check out everything garmin provides for aiding training.