I have owned my Kvetun standard feder for over six months so can now offer a rounded review including durability.
First the bits that are not made of metal. I ordered my feder just before Christmas and from my first enquiry to it landing on my doorstep the customer service has been amazing. Most of us have had less than sparkling service from HEMA suppliers but Kvetun are truly one of a kind, quick, responsive and friendly. Really the best customer service I could have asked for.
Delivery was longer than anticipated, but I was kept informed. This was due to Christmas, holidays, and other factors. It was still under three months and like I say, I was kept informed.
The important bit: the sword bit. I bought the feder because I liked how they perform. They are incredibly nimble and I love the way they handle. Balance is near perfect. Being the picky type I measured the product I got to what was ordered (length, point of balance, etc.) and it was all what was stated.
Durability is good, I have thrown it through the ringer for six months and cannot complain at all. The leather binding has gone, but I always expected it to. All the metalwork is still good and looks like it is going to stay that way for some time!