I love mine, when I get to fire it at the range, as I have trouble keeping it away from everyone else that want to have a go of it.
Sadly, here in the UK, the only semi-auto rifles we are allowed are those in .22RF.
I've had fun accessorising mine, with repro sling, repro canvas cover and repro wooden grips to replace the plastic ones.
I've also got one of the GSG pic rail adaptors that replaces the rear sight assembly, but never got around to fitting it yet, but may be forced to this year as the old eye sight has deteriorated enough that a red dot will have to be the way forward.
I was lucky to get hold off 3 x spare mags a few years ago, just before they started making them out of unobtanium.....