I love all the feature of this mobile . the green leaf go up and down as it spin , the main panel light up , and there be four different choice for song\/sounds . I like that it be battery power . my older son 's mobile require cranking , and only stay on for about 3 minute . I also like that you can turn it on by remote , maybe give yourself a few more minute before the baby see you and want out ! the only negative so far be that it do not fit well on we crib . we have a sleigh-style crib , and it will not fit on any curved surface . I have to put it on the front rail -lrb- straight -rrb- , but ours be pretty thick , so the clamp can not fit fully around the rail . it be on there , but not as well as it should be . it also pitch forward sort of awkwardly because it be not clamp right .