Since this is a stick thread, I'll point out that I discovered that theC64 mini controller is truly abominable.
While the400 stick is flawed, I refused to use that theC64 piece of crap stick for more than about a minute.
A key difference though is that I paid about $75 less for theC64 - so just throwing the controller in the trash is a more 'acceptable' solution...
Definitely a huge part of the reception overall.
Some folks were tripping over themselves to ignore/excuse 2600+ flaws, here for the400 not so much.