It looks like a mildly interesting cartridge on the surface, but it can't do anything better than calibers that already exist. If it's primary reason for existence is having one more round in a SP101, I just don't get it. Not bashing it, I just don't see a good reason to invest. Plus, I already have enough calibers, thanks.
If I owned an SP101, I might think differently. I just saw an ad for it in one of the gun rags I get, for the first time, so I'm betting it will take a while to catch on.