I love my spare ball, because since it's a Buzzsaw XXXL, it's more effective on fried lanes than a White Dot, Maxim, etc., I've always used plastic for spares, because I could flatten my wrist out, and hit 10's and other spares with my strike ball, but I don't want the ball to turn and hook just enough to miss a 10 when I need that spare the most which I'm always afraid will happen, hell that even happens with the plastic on really dry lanes sometimes. Sure, there are sometimes at tournaments and whatnot that I wish I had room for one more choice of strike ball in my bag, but spares are what win tournaments, and I just feel more comfortable with that little extra margin for error on the spares.