When I opened this up and put batteries in I was blown away by how easy it is to use. However, after a few uses I did find some issues with the unit as far as its seamless use.
a) I went to a course with 27 holes and found that while it had all of the 9's in it, they are set up in 18s, and had blue/green, red/green, blue/red. So I end up playing "green/red" and since I am playing green first it wont find the hole I am on and became useless for the first 9 holes.
b) I have had a few instances now using it for 3 or 4 rounds where it doesn't automatically move to the next hole when I move. By the time you go to look at it you realize it hasn't moved you and then you need to manually tell it to go to next hole and it then needs to "find you" and this causes you to just say screw it and hit your shot
c) the belt holder is not great on the unit and so you need to put it in your pocket or leave in cart and since it is rubberized outside it is not easy to get out of your pocket!!!
All in all it works quite well a lot of the time, is accurate and easy to use, very simple. It would be great to have a bigger screen and I am sure as I play more courses it will work fine I have played some obscure ones out of the gate which I think have tainted the review. I give it a 3 as it is good value and has hundreds of pre-loaded courses etc.