Did this a short while back and already received a response from my Senator's office last week.  The reply did not address anything I mentioned in my note, but only touted the positive aspects of the bill regarding where the revenue generated will go (which by itself I certainly don't disagree with, rather I disagree with 
how the revenue is proposed to be generated).  
Granted, it was just a generic form letter with my name inserted at the top, but I definitely don't feel my opinions were even considered given that none of the points I raised were addressed 
in any way . . . not that I ever had any faith in our politicians, anyway 

  I mean how hard could it have been to use the form letter and just insert a short statement at least acknowledging the particular points I object to.  It would have taken a whole 2 minutes for some assistant or secretary to do so just to at least show me that my voice is heard