I've been using my CatEye Micro Wireless and only one time did I have some type of interference, and I'm not even sure what caused it -- I have ridden around stoplight timers, power lines, cities, etc., all the stuff you'd think would normally do it -- and nothing does. I never saw it happen actually, just noticed one time my max speed was like 60mph and figure that is what did it. Only once though.

I haven't killed any batteries yet, but I don't see one more little battery being a hassle.

Install time was a little longer, but I was trying to set a record. I could do it in 15 minutes if I tried it again.

My main reason was the lack of wire -- and I have not been dissapointed, it's done everything I wanted it to.