I haven't had any issues with mine yet. But I don't have a lot of time in it so far. I've only played a little of the Zelda game (Just got into the first dungeon) and I haven't tried putting on those little cover things. Now, I know to match the symbols at least.
I have a screen protector on order and will likely leave mine in the doc until that arrives. I did not expect there to be as many problems as that video compilation shows. The inability to transfer save games is really bad. So if there is a problem with mine, my Zelda game saves will be lost. Depending on how far through I am, that's when I pack the system up and just leave it in a box in the collection and be done with it.