Now for a real inflammatory question:
what good is a cheap tuner for MOST players now that we have heard how many things don't have anything to do with absolute frequencies?
I'll even up the Ante: if a player doesn't "hear" that they are out of tune WITHOUT a tuner, how could a tuner help in a real playing situation.
What I want to say is that I have NEVER had a student who learned to play in tune "by the numbers". Even my time with a Stroboconn was cool, but not necessarily fruitful.