This is not a Stand-Alone product, the base GSX Product is required.
FSX+SP2 minimum, or FSX+Acceleration Pack or FSX:Steam Edition, or Lockheed Martin Prepar3D ( the latest version of every supported major release, for example 3.4 in P3D4 or 4.4 in P3D4 ). Windows 8.1 is the minimum supported OS.
**Purchased This Directly from FSDT**
FSDT products are always the best espacially because of their low prices! The performence of their products is always phenomenal! They always make sure that they cover all the details even the minor ones. I've been using all their products for a very long time now and i have never been disappointed. I highly recommend all their products!
It would be nice to do so when changing the time of year and would change the clothes of ground personnel. Especially in temperate latitudes and in the Northern regions of the world. But this is only a suggestion :). In the rest of the only five!
So far, after having bought GSX Level 2, I consider it a nice and interesting add-on, which suits mainly: Default Jetways and Static Jetways. I don't like the idea that GSX L2 Jetways won't dock AI Traffic - I could live with that in airport with static jetways, which is the same in the end. But, airports designed with SODE or IK Jetways, it doesn't makes any sense for the GSX L2 update - at least, that's my opinion. The product does what it's expected to do and for a single price, you can update many outdated sceneries.
Have enjoyed the GSX suite since I first got my first FSDreamteam product. Umberto and his team simply outdo themselves each time.
I do wish that we could get back to multiple buses when you have multiple doors open (especially on larger aircraft). That would be my only gripe :D