Thanks for all the good advice. I had the gun out to the range and man, it is fun to shoot. I started out shooting from the "hip" (more like the ribcage) with low recoil buckshot and low recoil slugs. The recoil shooting low recoil ammo from this position was very manageable. Then I switched to holding the gun up, aiming down the barrel and keeping the grip well away fro my face. No problem. The low recoil ammo was quite pleasant to shoot, and I was surprised how accurately I could shoot at about 10 metres.
Then I switched to regular buckshot. It was manageable from the hip and while holding the gun up an aiming (again keeping it well away from my face). The gun was hard to hold onto while shooting regular strength buckshot but I think I will install a "Shockwave" style strap on the pump for a little extra control.
I can't imagine shooting magnums through this, but I have seen it done on YouTube.
Definitely not regretting this purchase. It is a blast to shoot!