ya they have a tendancy of making heavy tires, but..... its kinda good because the rubbder is thicker making it harder to pinch flat if you case on coping or rotate wrong:P
Oh, not sure how you will find them, I'm assuming they will feel different to my brothers as his are non-folding an im presuming a different compound, I am interested as to how you will find them, so I will look out for that one!