I'm a daily strava user; commutes, long rides, anything in between. I like statistics and I like tracking my progress, and this is the easiest/least expensive way for me to do it. I used to use a cycling computer and right everything down in a notebook every day! This is much simpler and since I see it every day, it keeps me motivated. I typically don't see too much of a battery drain, even on my two hour rides (typically around 10-20% drain per hour, unless I'm actively using the maps, which I'm typically not). Heck, my under-five-miles rides make up the VAST majority of my riding, so I definitely want to keep track of them. When I forget to turn it on, it really does bum me out a bit.

Wouldn't mind using a Garmin, but hard to kick in the $300-400 for such a specific device. Having garmin-like abilities on my phone is convenient and affordable, even though it's not as a great of a tracking device as a Garmin, but hey! It does do more than one thing! Which has got to count for something...