Yes I have. My first ever call. Plopped it into my mouth and 15 minutes later I had some cow mews working. They seem alright! I just like the fit of rmhc better.
I picked up one of the non-metal versions and even though it looks and measures exactly the same as some of my other diaphragms......the sounds just don't naturally flow from it for me. It should fit the exact same way as the others, but I have to force it to get the right sounds. I don't like reeds that I have to force.