We don't use a mobile to get our son off to sleep as he's quite good at self soothing. However, it is a useful distraction tool for the times he doesn't quite want to go to sleep despite having been sitting there rubbing his eyes for a while and getting grumpy.
We had a wind up one which was really nice to look at but Christ Almighty, it sounded like a Mr Whippy van was in the cot and it didn't last very long either.
The volume on this can be adjusted (2 settings) and there's 4 choices of things to listen to: Rainforest (which is actually very soothing), Bach, Beethoven and Mozart. Music plays long enough to provide an adequate distraction so you can finish getting dressed or have a shower while they're safe in their cot.
"Features 3 soothing settings: music, motion and lights; music and motion; or music with night light" That's 4 settings then?! But yes, it does so if you don't want too much stimulation but want some white noise then this is good to go. The light isn't overly bright, it's not going to leave a nuclear shadow on the walls, so don't go hoping to use it as a nightlight to see things by. It's bright enough to just about be able to see what's going on without burning the baby's retinas off.
It was very easy to put together (you'll need a screwdriver, D batteries and AA batteries if you want to use the one big buttoned on/off remote control), no swearing on my part except for when the hubby kept wandering off with the screwdriver and was easy to attach to the cot bed.
It does say for use from birth to 5 months old though. Our son is 6 months old but it's still out of his reach and he's not at the stage of standing up in his cot as yet. I expect when that happens we'll have to see if it's still out of reach (he's quite tall...) and make adjustments if necessary.
Overall, I really like this product and so does my son :)