Well, I was using mine for the 2nd time yesterday and it started leaking and slowly lowering halfway through rotating my tires.
I'm within the 90 day warranty but I have to pay for shipping to get it to warranty repair. Wish I'd saved the foam inserts for the box.
I'm pretty sure that it's the main seal leaking since it's not coming from the top, and the only drain plug/breather is on top, fully visible.