I have an etrex 20. It’s not fancy but it’s pretty good as a multi-use gps. AAs mean battery life isn’t an issue (get probably around 24 hours out of a pair, if not more). It’s chunky and looks pretty unfashionable on a bike compared to the more fancy biking ones. The bike mount isn’t that great (I use a cable tie to make sure it doesn’t come off!). Usability isn’t the best (e.g. panning and zooming are very slow) – certainly compared to smart phone map apps. Don’t know how it compares to the Oregon model. Navigating in the hills isn’t easy on any thing with a small screen as inevitably you can’t see the detail and the bigger picture at the same time. I normally load a gpx before I set out and follow the coloured line. If I’m in the mountains I’ll have a paper map too.
Despite all those caveats, I think it’s great. The tart in me still wants a fancy slim model for my road bike though!
I agree, even with its downfalls its still a fantastic device for the price.