Can't trust a wireless? Hmmmm; well anyway my Cateye Wireless 2 is now 5 years old and still going strong but my previous wired job only lasted 2 years. Cateye has an excellent service department; my Cateye couple of years ago lost it's sending unit a year after the warranty expired, so I contacted Cateye and they sent me new one for FREE and I got it 2 days later postage paid.

I have the older model that supposely had troubles when passing near high voltage power lines and interferred with HRM's. I don't use an HRM so that wasn't going to be a problem; and I never experienced any problems passing near high voltage power lines.

The batteries last quite awhile; the sending unit last about 1.5 years while the computer battery has never been replaced since it was new.

But I would buy the Cateye if for nothing else but for the excellent customer service.