Here is my review I had posted on another site for someone trying to compare a few GPS units (SkyCaddie and IGolf)
I just purchased the GolfLogix unit from Garmin - here is why I chose the Garmin:
1) I had the one of the very first versions of the SkyCaddie used in conjunction with my Palm Pilot. They had already released a version of the SkyCaddie that looks like - and I believe is now known as - the SG1. I needed some technical support help last year and found they only had 2 guys in their technical department that supported the palm pilot version anymore. They were able to help me fix it, however, the same problem happened again this year. When I called for support this time I was told they were no longer supporting that product and I was out of luck. When reviewing the options on the market today, I was discouraged to see all of the Customer Service issues with the SkyCaddie from other users, as well as my first hand experience. I understand that products do reach a certain point in their lifecycle where the companies no longer have the resources to support their legacy products, but I would like to think they had an upgrade plan or something to offer their early customer base (i.e. - custome loyalty discount).
2) I considered the IGolf based on their pricing and the ability to do some of the "self mapping", that being said, I was concerned about company longevity and support (I did not do a ot of research on their company though). Also, they have not mapped a course I like to play when I travel to visit family - so that played a small part in my decision. With Garmin, I feel very confident they will be around for a long time and GPS is their business.
There are some things missing from the Garmin I would prefer....self mapping, a few more layup points, scorecard, and last shot distance - also it was pricier then the others although I had a 15% discount so that helped. On the positive side - it is a Garmin, it takes AA batteries (which is a big thing for me), auto advance to the next hazard/hole without interaction, unlimited courses for $29/year as opposed to SkyCaddie price structure, and waterproof casing. Also, Garmin's website lists some screen shots of some "futures" that current customers will be able to upgrade to at no cost(hopefully they stick to this). I have played three rounds with the Garmin and I am still evaluating but so far I have been very pleased. The distances seem pretty accurate on the course I have played (same course both times).
I did speak with the Manager at my local "major" golf store and he said of the GPS units either the GolfLogix or SG2 would be my best bet, however he did say that the SkyCaddie's were the most returned product - it could also be because they sell those the most - who knows.
Hope that helps.