Sig 1911-22 is the same pistol as the GSG 1911-22, of which the GSG is cheaper. You're just paying for the Sig roll mark. I have the GSG version, and love it.
Great training for clearing malfunctions and trigger time. It's fun to see a ragged hole of 22s. Not a target gun by any means, but it is fun to shoot. Picky ammo, yes. But I can care less. I mix my ammo so the low velocity will cause malfunctions, but it give me a chance to practice my clearing techniques.