Difficult to get folk to say ' This is rubbish' when asking for a pre buy opinion.

I shot an M17 and thought it was pretty poor.

But many owners like their Sigs.

But as I said above most co2 pistols are difficult to source parts for and repair.

The first range of Umarex pellet firers are the exception to this rule.
Which is why the are still popular.
Even they have their repair ' moments' !