The Mobile runs with us every day min. 2 hours (mind you still with the original batteries !!) and my son is still thrilled. Once the animals start spinning in circles, he squeaks with joy, babbling to himself and laughs. He's so cute that I have here already shot some videos of him and myself look forward again and again that he would be so.
On good days, he is well over an hour at a stretch under the Mobile and is just happy and satisfied. So I was able after a short night before the odd hour of sleep to catch up on the sofa (here is the inestimable value of the remote control to highlight) or even in peace do housework or even make calls with my girlfriend. The music I find very pleasant and unobtrusive, even after 3 months, it still did not bugging me.
Of particular note is that you can let the Mobile run on 'mute', which is totally practical, if you want to actually listen to 'normal' music.
As for the often criticized engine, I can not share this opinion. Yes, you can hear the engine and also a faint clicking noise when the animals turn, however, this is only marginal. To me it's just very noticed at the beginning and since actually no longer. However bother us never.
We do not use the mobile to fall asleep on the cot, but have it in the living room of his playpen. I think, just in small babies a Mobile is much too exciting to be able to fall asleep while can. In addition, the mobile is so pretty and cute opened that it would simply be a shame to hide it in the bedroom. Quite apart from, I use it even more intense in the living room.
Until now all our visitors, both babies (up to 8 months), as well as adults as enthusiastic as we are. From my experience I can put it at No. 1 of the 'must-have's for babies'.