I'd never base a purchasing decision off of a singular opinion, but --
If the forthcoming user reviews impute similar attributes to the Momentum then it's not for me. However, there's a huge market for a headphone with a layman-leaning (this is not stated derogatorily, mind you) sound signature housed by a ritzy aesthetic, so kudos to Sennheiser for bringing something to market that the Beats-using masses could unrepentantly graduate to. (again, no derision intended)
Thanks for the review, Jude!
Oh the "big deep solid bass with crisp treble" sound signature? Lol, I see what you mean.