I think if you stand 100 scrollers in a row, 80 of them will be faithful followers of FD blades. There is no doubt that they are a well-constructed blade. That said, I have never had good luck with them. It probably says more about me than the blades, but I just have trouble controlling them, especially when cutting thinner stock. I do use them for thicker stock with pretty good results. My personal favorite is the Olson reverse blade. I don't know that it lasts as long, but I find I feed fewer projects to the wood stove.
Probably the best advice as stated above is to try several different brands and styles and see which works best for you.
Happy Scrolling!!
Jim