There's only a couple of things that are holding me back:
1) Auto-pause. I hate having to manually stop the Band when I come up to a busy street where I have to wait to cross. A couple of times, I've accidentally stopped my run because I accidentally hit "end run" on the touchscreen.
2) Historical data - I have about 8 years of running history saved from my Garmins and I just don't want to give that up. I like looking through the years to see how I've improved (or not I suppose)
3) I don't often run in the rain, but I know the Garmin doesn't have any issues (including the touch screen working). I worry that the Band either wouldn't survive, or would at a minimum have some serious touch screen issues with wet hands.
To close out my own thread here, I've decided to mothball my Garmin
except for a big race.
1) I've gotten used to not having the auto-pause and I haven't prematurely ended a run in quite some time. What I do is when I need to pause, I also turn the screen off right away. This prevents me from accidentally hitting "end run" on the screen.
2) Historical data - Since I bought the Band right at the first of the year it was a good breaking point from the Garmin. I can still hit my old Garmin data, but I really like not only having my running data, but all the other stuff (sleep, steps, calories) in the same spot.
3) Rain - Enough replies from people have convinced me that this isn't to really worry about.
I've recently completely a marathon (just beat the 4 hour mark which was my goal!) with both Band and Garmin on. Distance was dead on throughout. My 1 mile lap alerts were always within a couple of seconds of each other. Heart rate (Garmin chest strap) was pretty much dead on until mile 21 or so at which point the Band pretty much stopped recording. I was really looking at it during the race so I didn't notice until later, but I suspect that was because at that point I was more than a little wet from sweat (and dumping some water on my head) so the Band was probably slipping a lot and couldn't get a good reading. I was definitely too tired to care, I just wanted to cross the finish line.
So, to sum up my experience: Band is lighter, locks gps faster, doesn't require a chest strap to get a heart rate, and is just as accurate as the Garmin on all of these except in extreme circumstances. I do wish the Band displayed lap pace though but I'll survive.