I'm really unimpressed with them having mineral oil in La Mer. You expect that from cheaper brands but when they're charging ridiculous amounts for their skin care, they should be using an oil that has a few more benefits in it than mineral oil.
Having said that, I do think mineral oil has an un-necessarily bad rap that some 'natural is best' people have put out there. At the end of the day I've never found any studies that prove that mineral clogs pores or anything, it doesn't, it's non-comodegenic, it's the least likely oil to cause any reactions…. Natural is not always best.
However, I personally don't like the feeling that mineral oil leaves on my skin and my already horribly dry skin becomes dryer if I use creams with it in. There are much better oils available for skin care.
There is a place for it but I just don't believe that place is in a £100 or whatever jar of face cream.