I'm looking at getting a 25...I don't watch my data at all on rides and don't want a tablet hanging off my bars. BUT I've been using my Iphone and recently noticed it missing strava segments in forests, and I've been doing some rides up to 5 hours which pushes the battery on the old and weary phone.
So is the 25 as accurate as other garmin models?? I was comparing my iphone GPS trace from some very twisty sections at Kowen (stairway and rhomper room) with a friend's 510 (i think) and his trace followed the trail perfectly, mine was all over the place and missed a few segments...
Also does the 25 work with the strava beacon app?? The strava website doesn't list it as compatible but it has bluetooth and the Garmin LiveTracking feature so I don't see why it wouldn't??
I went for a 25 due to battery usage and accuracy vs my android.
The 25 (or 20) is tiny in comparison to other garmins, and I didn't want or need the maps on the higher models.
The 25 uses Glonass and well as GPS, and position pick up is nearly instant. ( I know the Android also uses Glonass and GPS)
As mentioned by carpetrunner, the update time is a lot faster compared to the Android and is more accurate for positional data.
The higher end models use barometric elevation measurement, the 25 uses GPS and isn't as accurate.
I don't use a speed sensor (or any external sensor) so cant comment on the speed accuracy, but I'm sure Carpetrunners statement is true.
Yeah as you say, Garmin states that the 25 uses Livetrack, which is used for the Beacon capability. That said, I've never used it. (I wasn't aware of it)
"Live Tracking
When paired with Bluetooth®, Live Tracking lets friends and family follow your ride in real time. Invite followers using email or social media, which lets them view your live data on Garmin Connect."