I?ve only had this controller for a short time battery life seems to be great. My daughter is somewhat between a size 5 & 6, but I read that they run large so I ordered the 6 & I?m so glad I did! Its great now. Would recommend this product This makes it almost equally adept with edm, rock, hip-hop, or classical. I researched them, and watched videos on most. Ok so even after reading the reviews I ordered my actual size 11 which for some may have been fine however, I don?t like when my heel is right at the edge or my toes. 5US. Pros:Hardware looks great, very sturdy and solid. A waterproof marine amp should not have screw terminals and this doesnt.