I posted an issue I was having with WTForms on a Flask application I'm building, and David was the first to answer my request. I was at first suspicious as none of the skills he says he had on his profile had anything to do with Python, Flask, WTforms or Jinja.
Well, I was wrong to be suspicious as he was able to find the solution for me, and in a very very fast time (he does not waste time at all which when you pay per minute is highly appreciated). It turns out he had some very good knowledge about Python but did not mention it on its profile.
Very helpful, will certainly use again.