this mobile have smoothing , soft music and slow motion which be the main factor for purchase . it be not too loud and will not keep a baby -lrb- -lrb- or you -rrb- -rrb- awake . the light it give off be not too bright . the mobile not only rotate 3 small , plush animal but raise and lower 3 leaf . in a dark room a child will not be able to see the motion even with the night light feature on . it only play for 18 minute . which be good and bad . good : play just long enough for a tired child to fall asleep before turn off . bad : do not play long enough and upset the child if it turn off . the remote be nice but only work if it be be on very recently . you can not start the mobile with the remote . battery life seem good . this be not design for a soft-sided crib or playpen -lrb- which be what we originally have as we child 's bed for the first few month -rrb- . it be also not design to fit on a very thick\/wide crib rail . I be considerate of this fact when I finally buy a full size crib recently . I still have a little trouble mount the mobile as the ` screw ' part be far too long and I have to cut a couple of inch off so the crib could sit closer to the wall . \*\*\* UPDATE 7\/24\/2011 \*\*\* after have this mobile for nearly a year it stop spin properly . the music and light work perfectly . so I think the battery be weaken . even with new battery the mobile need help to start spin sometimes . I do not know if it stop spin once it start as I would leave the room so my child could sleep . I contact Fisher Price regard the issue and they have ask I to ship just the base to they for a replacement . seem to be a known issue . \*\*\* UPDATE 12\/13\/2011 \*\*\* I have have the replacement for about 4mon now and it seem to be fine . after report the issue , and shipping just the base back , it take about 6wk to receive the replacement which be a brand new mobile . I have expect just a new or refurbish base ... seem kind of a waste . oh , well . the 6wk wait suck as my daughter still rely on this to sleep . we have the new one and have not have a issue at all .