I've had my ELEMNT for a few weeks now. Overall I like it a lot. The only major flaw for me is that the % grade/VAM function is, frankly, garbage and barely works most of the time. The altimeter seems to get the total ascent/descent numbers right most of the time, but when I'm doing a significant climb the grade often drops out to zero, and seems to stick hard at zero even when I'm in a shallow climb (say 1-3%) for several minutes. I've heard several other complaints about this so I don't think I have a defective unit. I've never been totally happy with the altimeters on the various Garmins I've owned, but this is another league of badness. Supposedly the Bolt has the same chips under the hood so I wonder if it does any better.

Battery life is decent. I estimate I'm getting about 10-12 hours with speed/cadence/HRM sensors, and turn-by-turn routing all active, and using the map display most of the time (so there's a lot of screen redrawing). The ELEMNT phone app, which needs to be running to get phone notifications and Bluetooth syncing (I think), seems to suck power though, and is dog slow in general when just scrolling through the displays (iPhone 6s).

Does anyone know what the behavior is when the Elemnt loses GPS track? Yesterday I was riding along on a rural road, clearly on the correct TBT route with no turns anywhere nearby, when suddenly the Elemnt started flashing the off-course warning at me (red LEDs flashing across the top). After a minute or so it went back to normal. I noticed I was under heavy tree cover so I'm theorizing it lost the GPS fix, but since there's no satellite page I couldn't get any read on the number and signal strength of the SVs it was seeing. I think there's a data field you can put up that is the estimated GPS accuracy but I didn't have it configured on any of my data screens at the time.