I just got my 520 plus to replace my 520. I like that it actually connects to my iPhone when it turns on. My 520 required me to reconnect after a ride to upload it. That alone is grand. It has a lot more storage space, which will come in handy. I have a North American version, but plan to attempt to take off the Garmin map (saving it elsewhere) and replace it with an Open Street Map of France, where I'm heading for vacation. I'll use DC Rainmakers 520 directions. Here's hoping that works.

Otherwise, it seems very similar to the 520.