Last day for 50% off sale:
http://www.rexsimulations.com/
I got both running on FSX Steam and they look good. Doesn't seem to affect frames on my system.
Quote:
ALERT: SERVICE PACK 1 is now available for all REX Worldwide Airports HD users! To update, please use the CHECK FOR UPDATE feature within the application. This update includes the NEW FREE Enhanced Add-On Airport Packs Section, including KSLC - Salt Lake City!