I like that the display is big. I can see my stuff as I ride. The touch display is nice to toggle between screens. The map is nice you can search for things. I like the route feature for organized rides in unfamiliar territory with turn by turn directions and how far to the end. When in routing mode there is a elevation display feature that will show you where you are at in respect to the climb. I like that the battery lasts long enough to record my longer rides. I used to have my iphone or old 305 fail past the 4 hour mark often.
Overall I have been very satisfied with the unit. What I use the most is the cadence, heart rate and speed. That is a basic feature but I used to not see the combination together and I find it helpful.
There is a work around to buying the maps check out the blog on dcrainmaker