I know some people have gripes with the 600 series, particularly with geocaching. I’m only a casual geocacher and use my unit for hiking, biking etc. I think my 600 is everything the 450 promised to be and failed to deliver. I remember my first time I took my 450 out – it was overcast but bright conditions. When I realised I could barely see the screen and there was no way I could improve it with backlighting I did get more used to it but it was useless on my bike handlebars where I couldn’t exactly tilt it to get the best screen angle. Thankfully I got a decent price on ebay (poor sucker) when I traded up.
Reset not resetting after gps acquire - Oregon 450 w/6.60. I have an Oregon 450 w/6.60 running on. Volvo Vida 2010a Patch. But am a long term user of Garmin software and hardware.

I had an Oregon 550T for a about 10 months, after selling my 60CSx. It was ok, except for tracking, battery life, and to some degree visibility. I also had some annoying error messages during PC connection. I was thrilled that Cabelas took it back for full credit!
A new Monterra is the ticket, but it’s too early to tell if it is the much better unit I am hoping it will be. Some initial Monterra concerns: -Widget modification – I really hope to find a widget design tool so i can FIX the available widgets! -Size – this thing is big, hand is still not used to it yet -Icon clarity is a bit weak. In addition to the poor screen visibility, navigation round the menus on the 450 was a real pain.
Take for example toggling maps on and off – the clue to how is should have worked is in “toggle.” Instead you had to scroll through a list of maps (each item was large so only a few were visible per page) and then you had to select one then enable/disable it. On the 600 you simply tap to toggle. Magic Video Converter V8.0.8.25 Key-heartbug. Also, leaving the map page to dig your way through menus to get to a function then backing out all the way to the top then back down to maps drove me loopy.
Again the 600 improves this – you get a context menu on the map screen and a hideable (by swiping) dashboard with configurable fields. All very flexible and usable. I could go on, but you get the idea. I’m not sorry I made the move from the 450 to the 600.