I like BD. Mostly, they seem pretty straight. Every now and then, I'll pull out a Terumo needle and it looks crooked a little bit, but no big deal. If there is ANY difference in smoothness of each pin at all, then I can't tell. And I bet if you blindfolded all the members in here, poked them twice in the arm, one with BD and one with Terumo, nobody would know which is smoother.