Joined: Jul 2007
Posts: 8,611
Likes: 3,535
From: South shore, L.I., NY
Bikes: Trek Emonda SL7, Cannondale Topstone, Miyata City Liner, Specialized Chisel, Specialized Epic Evo
My Garmin 810 has US GPS only, no GLONASS. I've never noticed.
The 810 boots up and finds satellites pretty quick in my experience and tracks a road ride very close. or at least the track as viewed on Connect after the ride is dead on. I've seen repeated accuracy of about 6/10 of a mile per 100 as compared to a calibrated Cateye wireless cycling computer.
I had heard that riding in deep woods can make any GPS inaccurate, GPS or GLONASS, so I use a speed sensor on my mt. bike.
If you could find an 800 or 810 cheap enough, they work well as well. Or the Lezyne units are good deals.