I have a Cateye Strada Wireless. No altitude or cadence, but I'm okay with that. I know my cadence is slow and I'm a flatlander so altitude is kind of useless.

It seems to be pretty accurate. I've only once had an issue and I think the sensor had moved so it wasn't registering correctly. Not an issue to fix.

I noticed a couple of months ago that George Hincapie was using a Cateye Strada Wireless (his may have had cadence), so I figure that's a pretty impressive endorsement.