I was about to purchase a competitors ground services product when I ran across GSX by mistake. Here is what made me decide on purchasing GSX:
1) Works at every airport (this was a major plus)
2) Animated baggage handlers and caterers
3) Works with many 3rd party planes
4) Not overpriced (very fair price in my opinion)
5) Well supported
6) My favorite airline livery (WestJet) was included!
7) Purchase incentives (I bought all 5 Hawaiian airports as well because of the great promotional discounts)
You guys really raised the bar over the competition with such a superior product, and I am very happy to support it. I'm Canadian, so I'm also pleased to see Vancouver airport being developed. Hopefully my city (Edmonton) will be released one day. Great job to everyone involved!