I have had a Garmin 510 about 3 months. The last 2 rides all of a sudden the watts and cadence fields go blank. If I turn the 510 off and on again it will come back. That is not what I expect from a 400 dollar bike computer! Save your money guys!

Have you checked the batteries in the cadence sensor and power meter?

No. But the chances that they both have low batteries at the same exact time. When I turn the Garmin 510 off and on again it read the watts and cadence the rest of the ride today.

I have a 510 and have had the same thing happen with my cadence and hr monitor.

This is disturbing! I've been looking for a "one gadget to rule them all" solution with power management due to my SON hub, and am coming back around to either Digifit on my iPhone, or a Sigma ROX 9.1. Digifit iBiker has nice on-line features, though I don't want to deal with a pile of batteries. I have some lower-level Sigmas and they've been very reliable. I have already given up on a Ciclo HAC and a Polar CS something. Polar make some great HRMs, but I'm not sure they did it right when they tried to expand to a cyclocomputer.

OTOH, Sigma make a great cyclocomputer, and I don't know how their HRM functions stack up to Polar.

But if ANT has a handful of batteries to manage, then it drops off of my list, and with it all Garmins and the whole iBiker suite.

Have you email Garmin support?

[MENTION=23272]joshnc[/MENTION], no, I haven't. I'm wondering if they have released a software update because mine did it several times the first couple of weeks I had it but hasn't done it at all for the last month.

Put the latest firmware update. I had to manually install the latest one on mine to get the power readings correct.

I have my 510 and my only gripe is that sometimes when I am resting my hands (sometimes on climbs I'll rest my forearms on the bars) I will inadvertently switch screens or do something funky. Otherwise it's a very nice computer.

What? You mean to tell me I wasn't riding a 1299 watts at the first 5 minutes of my ride? I had a elevation gain of 14k for my ride today. I don't think Garmin tests these products out before they release them.

Garmin has a reputation for putting out products with a good number of issues, but they also end up fixing the, with firmware updates.

I have a 500 and an 800 and love them both. In fact, I would have recommended that you get the 500 instead of the 510

why? I see a very clear price advantage.