in-line spinners aren't nearly as good as artificial grubs. but i do however catch a 'gill or two with a chartreuse rooster tail when the going gets tough. i will catch around 8 fish on a plastic grub on a jig head to every 1 fish i catch with a spinner. but they still work. and when the "mojo" of my grub fades away i can tie on a rooster tail and catch at least a fish or two :D

bottom line is that grubs are the best, but always keep a spinner for when the going gets tough.