Pros: my friend recommended the Kun Collapsible shoulder rest to me and I like this soulder rest since it is both stable and not slippery, doesn't fall off my violin either. It was easy to adjust to my instrument, too, since there are 3 options on each end of the rest to adjust the lenght of it.
Cons: personally, I would prefer if there was more choice to change the angle between your shoulder and the violin. You can turn the rest sligthly but since it is quite low it doesn't make that much of a difference (I don't know how it would work if I purchased extra long foot). Therefore looking forward to trying the rest together with a new chin rest and see how that works.
Overall: light and stable, not disappointed with the purchase.