I have been using AKA tires/foams since they first came out and have been very pleased with there performance. Recently I wore out a set I have been using since Feb 09, raced them a few times, then they were used for practice , then finally street bashing/testing tires. I finally dismounted them and the foams still looked great. AKA is selling the tires without the foams so I guess you could save some money and reuse your foams.
AKA foams after 3 months of use.
Pro-Line foams after 3 months of use.