At the time, it was either a skyCaddie or an iGolf.

I went with the iGolf for 2 reasons:
1) No annual membership fee
2) 11 mappable points (8 custom) vs 8 point (5 mappable)

As well, there's a free dump site out there for iGolf users (an underground thing).

I love mine. Granted, that skyCaddie Intelligreen feature looks pretty sweet!