Different reviews on cross training shoes for flat feet are kind of mixed. People have been using different shoes like Reebok cross fit Nano , Invo-8,New balance etc. There are certain problems with these shoes according to the users. Some of them say that they don’t serve the purpose at all or they are not durable. However Nike Metcon Repper DSX managed to score a lot of positive review. People reviewed them as more comfortable and flexible than regular metcons by Nike. Some says that if you have a tough job where you have to move around a lot then these they are your best shot if you have flat feet.