No, I've actually heard the system. While the strain gauge is not a perfect complement to the RIAA curve, it's close. If you think your conventional phono cartridge delivers perfectly flat results you've probably never measured it.
Don't get me wrong - I'm not a big fan of the strain gauge concept. But I'd never insist "... it's a design for other kind of LP recordings but not for the ones that comes with the RIAA curve." That's simply wrong - the system is specifically designed for LP playback, whether it is to your taste or not.