Yes, I have one I have used for about a year now. Great gps to have although this years model includes a camera. That would be a helpful addition and elimate carrying a separate camera. Oh well.
As far as functionality, it worked great for me last fall on my elk hunt in Co. I was hunting in heavy timber the entire time and didn't have any problem keeping the satelites once I acquired them. Initialization may take a little long, but I can't say if it's longer than other gps devices b/c this was the first time I used I gps while hunting. I had been a compass and map guy up to this point. Tracks well, it has a huge searchable database built in to the memory to include trails and mtn tops, turn by turn directions, compass and all basic gps functions. Great unit to buy IMHO.
As far as price is concern, I think you can get a better deal than what is on the website you're linked to. I bought mine for about a $150 cheaper last May from REI. They have sales around Memorial Day, 4th of July and usually Labor Day. You can also check out Campmor, Amazon, and Ebay. If you aren't in a hurry you can get it cheaper I believe. Good luck.
I don't own the 450, but I own a 400T which looks to be basically the same thing. I've been carrying a GPS since 1996, and the 400T is my third handheld Garmin -- I ditched Magellan about 9 years ago. I bought the Oregon to upgrade from an Etrex Vista. The Oregon's display is amazing -- it's bright, easy to read, etc -- far superior to the Etrex series. It's also touch screen, so there's less button pushing involved. It's incredibly intuitive; you can pick it up and do whatever you need with it without even opening the manual. It boots up really fast, grabs satellites in no time, and generally seems more accurate in terms of matching your location with roads on the map. When I'm on the road, it shows me on the road, instead of running alongside of it like the Vista commonly did. Ecubacker mentioned it taking awhile to initialize, but I disagree. Based on other units I've used, this is the fastest. There isn't a handheld GPS out there that will plot your position in 10 seconds if you haven't used it in a long time or have moved a great distance since you last used it.
Let me start by telling you the story of two Johns.
John number one went on a day hike with a couple of friends in the Cascade Mountains about an hour from Seattle. He somehow got separated from his buddies and became lost. John was dressed in casual cloths for a warm weather day hike and had nothing but a lunch with him. He spent three days in those mountains and luckily made it out to tell the story.
John number two, a friend of John number one, was much better prepared when...