i have the cs200cad and find it very convenient. its all wireless, one sensor for both speed and cadence. attaches to the chainstay (so you can see your mph on a trainer unlike older model cycle computers). you can choose what to display. i dont like seeing the odometer, so when i'm riding mine shows speed, avg speed, HR, cadence and current time. when youre done it'll page thru and show you your elapsed time/distance/HR/cadence yadayadayada. you can also directly download from the cycle computer to the polar web site (kind of like a bikejournal). all in all i like it.
laurie
Brand New Orbea Diva | Pink | Specialized Ruby
2005 Trek Madone Road | Pink | Ruby
1998 Trek 5200 Road | Blue | Specialized Jett
???? Litespeed Catalyst Road | Silver | Terry Firefly