I think jumpsuits had two fashion moments, from what I remember.
I had one in 1969, flares and a halter neck like Coolgran's ( my Gran made it....I wonder if it was the same pattern?!). It was pale blue, slinky material and she made a long scarf to go with it. It was for the sixth form ball (I was in the lower sixth and it was my first big 'do').
The next time round was the early eighties, when I had a couple of boiler suit style jumpsuits. These were just worn every day.
I don't think they are very flattering unless you have a boyish figure (which I never did
, at least not after age 13), but that M&S one linked to looks lovely on the model.