Not that bad.
The G26 is easy.
The G27 is a little "snappy".
The G30 and the G36 is a good litte push.
The 29 is a bit of a kick, depending on ammo.
I haven't gotten to shoot a G39 yet, but I would assume it would be similar to a G30.
I also have never got to shoot the G33, I would assume it would be a little snappier than the G27.
None are bad enough that I would not want them.