I have had my Korkers for 4 going on five years and have not had a problem with them . I have the aggressive studded and the studded klingon both of them work very well and keep me upright in some pretty hairy water.
I fish nearly every day and these boots are in great shape considering the demands I put on them. So far I went through three set of inserts they just plain wore out from use, during salmon and steelhead season I fish 7 days aweek sunup to sundown.They are very comfortable to walk in for extended periods of time and a great wading shoe for the money. You won't be disappointed!