I've been using an Oregon 450 for quite a while now, either mounted on my bars or thrown in the backpack. It's a great unit imo. Possibly a step down/smaller than the Montana.
Great for mapping new to me trails, preventing me from getting too lost, etc. The altimeter will drifts with barometric pressure changes, the trail head elevation at the start and end of a ride can change by a couple 10's of feet over a few hours. However the unit does general get a pretty decent idea of how much climb/descent is actually going on. Even the little 10-20 foot punchy climbs register just fine.
It makes for a passable car navigation unit but it's certainly not optimized like a unit aimed at the car market.
I have the same, and bought it for biking because the display is a fair bit larger than the Edge units. The Oregon has heart rate and cadence interfaces as well as the multiple dashboards.
It can be used for automotive, but it's not a Nuvi; no lane assist and a small display. Works fine for hiking. With good rechargeable batteries I get about 12 hours of mapping time.
GPS City often sells them at a good price. I think I paid $189 for mine, and the price is probably still about the same.
FWIW, smartphones aren't great for accuracy unless you pretty much mount them on your handlebars, or if you are hiking, on top of your head. They're also more accurate when you have cell services as they'll use AGPS. Battery drain is typically an issue for longer hikes, but you can buy spare batteries for some devices, or add-on batteries for iPhones.
It is easy to dodge our responsibilities, but we cannot dodge the consequences of dodging our responsibilities.
- Josiah Stamp
Every time I see an adult on a bicycle, I no longer despair for the future of the human race.
- H.G. Wells