Summary: I bought my GPS 8 months ago. I have been using it about 4 times per week. Last weekend the heart rate stopped registering. I went to a local garmin Shop (Colombia, South America and they try it with a new sensor and strap but the problem continues. I already changed the sensor battery. Software is updated. Seemed strange to me as the problem must be with the head unit.
Summary: Pros: I really like the features of the product, a) page field program ability, b) wireless upload c)live tracking (b,c require blue tooth enabled smart phone), d) ability to easily change bikes and screens; e) up to 10 fields per page. Cons: a) The screen contrast is not very good making the unit extremely difficult to see unless the light is at a perfect angle. I rode with both my edge 500 and edge 510 and the edge 500 is much easier to see due to better contrast.
Summary: I recently purchased this 510 to upgrade from my 500. I liked the idea of the bluetooth technology and the instant access to upload to the internet. After buying it from REI, I realized the new 510 did NOT include a heart rate strap, and there's an $80 charge for the strap! I already sold my 500 to a friend, so I decided to try it out.
Summary: Software is buggy. Menus are not self explanatory and hard to navigate. Some menu items are ride specific and some or device specific and there doesn't seem to be much rhyme or reason to why one or the other. The auto shutdown doesn't always work and I've had the device's battery die. Screen is hard to see in bright sunlight. Honestly, I liked my old Edge 500 much better. Sorry I switched.
Summary: I have been using a Garmin Edge 500 for some time with my road bike and tri bike. I really liked the feature set of the 510 and I got it as a gift from my wife. I got it all setup without any difficulty, went for a ride on a beautiful sunny day, and immediately found that I couldn't read the display. I always ride with sunglasses for eye protection, and my lenses are usually polarized.
Summary: I bought the Garmin Edge 510 to go with my new Trek Domane 5.2 bike. The Trek Domane has a chain stay integrated ANT+ Cadence/speedometer sensor (DuoTrap) which was too well integrated to ignore. So even though I had the full Polar RCX5 cycling system (speed/cadence/GPS) and had turn by turn navigation rigged to work with my iphone 5 and the garmin Navigon application, I figured that the Garmin 510 would work great with the Trek DuoTrap and replace everything.
Summary: As far as a GPS goes this one does everything they all do and it does it well. The failure of this product are the "bells and whistles" that influenced me and probably most other buyers. Wireless updates to phone, ride updates from phone to Garmin connect and LiveTrack. All of the features that make this GPS a top choice on paper simply do not work consistently enough to consider them valid features..
Summary: I bought this to replace an aging 305, and I was sorely disappointed. For one thing, it's big and heavy - much bigger and heavier than I expected. The touch screen has a rubbery, unpredictable feel that sometimes requires a heavy push to register. It's hard to read in sunlight when it's clean, and once you cover it with sweaty, greasy, sunscreen-y fingerprints, well, forget it.
Summary: I "upgraded" my 500 with the 510. I have been using the 510 for a couple months. The recent software update made the unite better. Pros: Live Track is very nice. My wife and friends can see where I am at. A nice safety feature. I find the battery life very good. (I do not have the backlight turned on) Easy sync to Garmin Connect via Bluetooth. You can leave unit on the bike. Virtual Partner is good. Works well with my Garmin Heart rate strap.
Summary: So, I got the 510 to replace my old 305 and the Strava app on my smartphone. In summary, unless you love Garmin Connect, this is not worth it. A quick review: Pros: touchscreen interface is like a smartphone and does work with gloves on(only not- see cons) wireless upload (only not, see cons) accurate the cheap-o mount included with the basic package is totally functional and kind of appealing in its minimalism sensible data display- shows you what you want to see...