I adore Arches 300gsm rough, particularly this size on the block. The dimensions are perfect for my work, they can travel well without damaging the paper, I don't have to roll it, and the paper doesn't move like a pad. The internal and external sizing used by Arches is beautiful. I don't paint on the block as I use so much water, so I can't comment on bleeding, but there is only one small area where that could occur, otherwise the black binding on all edges seals well.