My wife owns one of these. This one came to our house because she thought the rifle was "pretty" and the cartridges were "cute". I have had a time with it where reloading is concerned and the accuracy just isn't up to snuff,in my opinion.
Others on this site have them but results and opinions vary. Personally, if I was wanting something in the 6mm class,I'd buy a standard 243.
I don't think the WSSM concept will not stick around very long.
HWD