I have used TKS several times without any problem, but the last time I sent in 4 knives in to be heat treated it took 3 1/2 weeks. Normally this would be fine, but one of the knives was a gift for my brother in law. But even the long wait wasnt the worst part. I called the shop after 1 week and they said the person who does the heat treat was out sick and it would put them behind a week. OK. Then called back after another week and they said it would go out the next day. I called back late the next day and the same person said oh i am sorry i will send it out myself today. I called back Monday of the 3rd week and told them I really need the knives asap, and explained if I didnt get them by Wed I couldnt have it finished by the trip to see my in laws on friday, I was told it will go out today for sure!.... Called back wed, the knives were still at the shop. This is when I finally talked to the manager who PROMISED to send them out and wouldnt charge for shipping. I DID get the knives the next day, but my brother in law got a card and I still have the un-finished knife. I appreciate the free shipping, but I would have paid double the 6.50 to get them in a timely manner. I just wish they would have been honest with me. I am looking for other places to do H/T.