I had the opportunity to run about 200 rounds through the G-48 yesterday. That is a very nice package! Just about the perfect compromise between power/capacity/concealability.
It is a Glock, so no issues with feeding, firing or functioning. Still a small pistol but not nearly as snappy during recoil as my G-43. Informal shooting I was getting about 2-3" groups at 20 yards. It was hitting to the left for me, which all my handguns tend to do. But a couple turns with the sight pusher brought everything back in line. Afterwards I was very happy to see that my favorite load of Winchester Ranger 127 gr. +P+ SXT hit right to POA/POI.
All in all I think the G-48 is a real winner.