The experiences I've had with them pretty much follow the troubles I've had with any other mouth calls...lack of consistency.
Two calls I found particularly frustrating was their ghost cut 2.5 reed call with purple latex, the
"prosecutor" and their 3 reed combo cut call "the preacher". The first 1 of each I bought were on sale somewhere, and I just picked them up for the price. Each call was a great call and I used them a lot. When I decided to buy more of each I found that none that I bought were even remotely close to the first 2 I bought. Haven't bought any more K&H calls since......