I don't have a lot of experience with it but from what I've read here on the forum, it doesn't yellow or crack. Here are some references:
http://www.swannysmodels.com/TheCompleteFuture.html
https://www.youtube.com/watch?v=37Wmy3HqHg8#t=0
http://www.modelcarsmag.com/forums/index.php?showtopic=8964&page=9
http://www.modelcarsmag.com/forums/index.php?showtopic=86705#entry1132789
http://ilovewood001.tripod.com/modeling/future.html
http://www.modelcarsmag.com/forums/index.php?showtopic=77351#entry979093