I'd purchased this product after buying and returning a long line of defective watches from Amazon (the other stuff is so good, I had to keep trying).
I'm about as handy as a foot, I've got terrible eye sight and a hand that sIhakes like a leaf, so I had low expectations that I'd be able to pull off driving a pin out and replacing it.  But you know what?  I did it without much effort.  I did bend the pin the next time around, but I've pretty much got the hang of it.
If you're purchasing a watch, and would rather drop the $5 on this or so, rather than taking it to a watch maker, I'd recommend it.  You probably won't use it often, but at this price, why not?