The response I got back from Schakowsky seemed to be your typical cookie cutter response that was tailored to the subject but addressed nothing specifically.
I then got a letter back from Obama that actually looks like it was typed up as a direct response to my letter. Although I doubt it was he who actually typed it, it does appear that someone actually put some personal effort into it, and didn't send out the prewritten response that you would expect.
I may be wrong, but I still like what he has to say. He's got my next vote.