I have used them for years
.Why ? well they did such a fine job . I asked the Doc if I could have the scalpels used on me and extra blades because the surgery cost so much .
He came by my room with a gift . All wrapped up with a red ribbon and all , there were three different sized handles and a hundred blades each .
he asked if I wanted the jar that had the slugs in it . Of course I said no .
I wish the perp had had to pay the bill . Oh my . Anyway I have been using these same handles since 1977. I think on sharpness there's a consensus that they are indeed sharper , with a light touch especially .They tend to break easier when carving something out of styrene though .
All in all , I prefer the touch of the scalpel , but the trusty old X-Acto will always be on my bench in it's various sizes .