All you need to know about Thumbshifter or Thumbies

This is an excellent collection by Rafael of Spain on  how thumbies/thumbshifters can be used on bicycles.  With Google instant translate, I am able to make up what he wrote.  You got to see this if you are looking to try a new/older way of shifting.  

Screen grab from http://aventurasenunabiciplegable.blogspot.com.es

I suppose these are not for every one in an era of Brifters... why would you even bother doing it the "Old" way?  I thought so initially as well until I got to try thumbies on my old Trek 930 
Its like driving a manual car, you need finese and once u get it, the drive train sound so sweet!