The Rally Armour flaps @ $130 aren't rubber, they are polyurethane (or something else scientific . I had them on my 08 OBS and they looked and performed great. Never curled, always stayed flat & flexible in the cold temps and kept the crap off the car really well.
I didn't regret buying them at all. IMO they were worth it.
http://i288.photobucket.com/albums/ll177/jmark42/DSC00030.jpg