Honestly, out of all the equipment I have for biking. This is probably the most useless because it doesn’t work like it’s supposed to all the time. It needs to be reset and never connects to my phone. I don’t know why it can’t just work. It’s a pretty simple piece of equipment. I’ve lost so many rides due to the crappy design of this product
I decided to purchase the Edge 540 because the battery in my older Edge 520 was starting to lose its charge. I also thought the 540 would operate in a similar way to my 520 to ease the learning curve. I've used the 540 for about a month now and am pleased with how it's been working. Yes, the control buttons operate in a similar fashion to the 520 although I discovered the menu layouts are different and it did take some getting used to them. But in the end being familiar with the 520 features did make the learning curve on the 540 much easier. The battery also holds its charge much better. I was amazed at some of the upgrades such as the alerts that pop up warning of trail hazards or sharp turns. So, up to this point I'm very satisfied with the Edge 540.
While I am still figuring out how to use all of the features, it was quick to setup and start using. The battery life is very good. I was able to customize the display to give me the information I need/want in the way I want to see it. I highly recommend getting the speed and cadence sensors along with a HRM to compliment the unit.
I had no time to figure out my Edge 540 until the trip. With relative ease I figured out how to load gpx files. Just the right amount of information on the map and no need to have my phone out, draining its battery. The feature to have text notifications was very useful. Without any study, I pretty quickly figured out the buttons. Battery life was very good, at least 2-3 days of navigation without a charge. Very happy because I was considering a charging hub but don't really need that with my Edge 540. Easy to remove and install.