I have the 220 as do many others, and I love it! It's really fast at getting location and I really like that you can do custom interval workouts with both distance and time. And the Garmin Connect feature it also great for setting up training sessions online.
I second what Emma said ^
How is the GPS accuracy, does it work well in the forest?
You can look at my tracks on my log... It's pretty good for the most part but it can sometimes miss a bit
For another option take a look at the Polar M400. It's about the same price, but has more features and the GPS is better (records location every 1 sec, apposed to every 3 sec). The downside is that uploading to Attackpoint would be more work.