I see this weapon all the time. It's a good weapon, even if it's rather ugly and simplistic looking.
It's such a good weapon that everyone and their mother uses it, and seldom with much effect. I see gankers use it more than the theoretical spankers do. I've personally fought it so often that I have memorized the moveset even despite never touching it myself. Thus when I see it I know what to do, and I win more often as a result.
Clearly despite being a staple of the meta since this games earliest days it's deceptively hard to master. plenty of people have outplayed me using the exile curved sword, but so many more haven't.
In conclusion it's a easy to use meta weapon for casual and aspiring players, but considering it's ubiquity I would pick up something else.