MaxX's ability is incredibly good. Basically you have a Wyldside every turn without losing a click. The down side, trashing 2 cards from your stack, is pretty bad, but it doesn't damage your reliability.
Going through your stack quicker means that there might be some issues against PE or the like. Luckily, Runners will be drawing cards anyway every turn against PE, so MaxX is essentially getting an extra click.
MaxX should be played very aggressively. Winning early on is good, so that you won't have to worry about getting anything back.
All in all, MaxX is a very strong identity. Personally, I'm not too fond of her, but her ability is so good, I made a deck for her anyway.