Polar CS100

Price Paid:  $100.00 at Performance

Favorite Ride:
Coffee Republic

Bike Setup:
Fuji Team

Summary:
Worked fine, with no problems of transmission from either the chest strap or speed sensor. THEN, during the first hot (90deg) race of the season, right when I really could have used the data of distance and HR, the screen turned black and it re-set everything. All current data was gone! This never happened before during cool weather training rides. I discovered the problem was heat. It seems unbelievable, but when there is not a good stiff wind blowing over the unit, it over-heats. I started to notice the re-setting always happened on steep hills in full sun. I bought it last Oct. and never had any indication of what it's problem was because the weather was cooling down, then the first race in April, it showed it's huge fault. Will try and take it back since the weather here in the CA central valley is hot from April to Sept. It might work fine if you live in cooler climates. I really liked it, so I'm bummed about this huge weakness.

Strengths:
Coded transmission works well.
Easy to set-up.
Love the on-stem mount!
Easy to use.
Clean mounting and no wires!

Weaknesses:
Overheats and the unit re-sets. You loose all your current data.

Similar Products Used:
Various Cat-Eye, Vetta, Polar, and VDO computers.

Price Paid:  $0.00

Summary:
Recently bought the CS100. Worked like a charm on the first ride, but by the second ride, the speed sensor no longer was picking up the transmitter on the tire spoke (despite being within ~ 2 cm from each other). So at this point, I'm not getting any speed or distance information.

Heart monitor still works with no problems.

I plan to return it to my LBS to see if they can get it working. Hoping that I just got a defective unit.