until you get to dslrs, its really a crap shoot. you got phones which are all crappy quality outside of optimal conditions, with the Lumia as a clear winner in quality
you than have point and shoot which may have a better leanse, but are about cellphone quality at worst.
you than get dslr where you really are paying for how much quality you want.
you want an opinion on them... get the best lense you can get and buy a camera based on that, because the best cameras are only as good as the lense they use, and a bad camera can be brought up to a higher level depending on the lense.