I prefer a gun without a stock extension, but I like them better than a big, thick pad and a bunch of spacers. And I do like small bore British guns, and I have several that I liked well enough that I bought them in spite of the extensions.

So I will tolerate a stock extension if I really like the gun otherwise. You can always restock it or do a butt transplant. And I find that I don't notice the extension when I am hunting.