The speeds are not very different from each other and the first is still quite fast.
Both positions allow to pass from a lateral swing (my son's favorite) to a back and forth rocking.
The music is well chosen: two volume levels and three types of music: lively, calm or sounds of the forest.
Everything is independent: you can put the desired music (or not), mobile or not, the desired speed, movement choice ...
The winning combo in my case: mobile + quiet music + a small toy or blanket to handle, low speed and lateral sway sleep is guaranteed.
Attention, however: the baby's head is not very well maintained, so, when he falls asleep, he risks torticollis, head to the side and sliding forward on the chin.
In short, a good buy but does not last long (enjoyed from 4 months and 9-10 months ended soon, when the child moves too much or reached the limit of size / weight).
Given the quality, this resells enough.
One last point: some models (who ???) have a mains connection with adapter. not mine! Hello battery consumption! It's almost the bulk of the total budget ...