Ian thinks these have a lot of potential, as they seem to be very well made - but as with any self-loading firearm they are dependent on having good quality magazines. Why MKS Supply decided to use junky aftermarket mags for the SHOT Show shooting demo, we do not know.
Karl thinks they look great, feel good and are interesting. However, he's never had good luck with M1 Carbines ever and so he'll wait to reserve judgement until he can get more trigger time on one. A 2Gun M1 vs StG44 match must happen. :)