Just a nit to pick with the course availability: nearly none of my local courses were available when I first got this unit. Within a week every single one was in. I simply filled out a brief request form online for each one I wanted added and they had them done literally within a couple of days.
As for distance accuracy I compared it to the Greenfinder GPS app on my Blackberry during rounds on different courses and it's always been within a yard of having the same distances. Also have to bear in mind a civilian GPS has an error estimate of +/- 3 yards or so. People who labor under the impression they have precise enough distance control for that to matter probably should get a laser.
Been happy with my Swami for some time, now.
ETA: in case you care, I did a review of this unit when I first received it:
http://spinrants.spinland.biz/?p=59