I just got my GPSMAP60 this morning and I was concerned after reading a lot of posts about it :Having trouble keeping signal, Poor accuracy- jumps around, and unreliable under tree cover. My old GPSr (Explorists 200) had none of these problems, so I was concerned.
I took it out to "Find" some of my caches close to my house that I know have extremely accurate posted coords on GC.COM- this GPSr has AMAZING accuracy and a very sensitive antenna- I love it. It "warm" starts very fast too. The only drawback I can see is you have to pay extra $$$.$$ for the available maps. --havn't tested under tree cover yet.....