Apart from the long distant past when I had bikes with shifters on the down tube or the 'crossbar' of my chopper I've only used rapidfire type shifters on my old & modern bikes. Now I've got a couple of bikes from 1990 & 91 on the do list & I can see I have a choice of period correct thumbies or STi shifters. I've never used thumbies so as someone who missed them first time round what's the pro's & cons? My instincts telling me thumbies are more awkward to use.