I had kind of an amazing experience..! I was really unsure about the site since I'd never heard of SSENSE but I was dying for this Alexander McQueen peplum sweater and it was cheaper by $150 than at Neiman's. I took the plunge and ordered the sweater from BOTH sites knowing that I could return the one to Neiman's if SSENSE actually came through with an authentic product and on time shipping.
They MORE than delivered! DHL shipped the sweater from Canada to Washington DC *overnight*. It was in better condition than the one from Neiman Marcus (SSENSE sweater was flawless and the Neiman's sweater had the MCQ tag detached in one spot and the item had clearly been handled in a store).
The sweater is 100% authentic. There's no faking this level of quality and fit. It's identical to the one from Neiman's, just in better condition, so I'm quite certain it's the real deal.
My only recommendation would be that SSENSE should put their items in sealed bags inside of the cardboard box. With the absurd amount of rain we are getting on the east coast, a soaked box would mean a ruined product :( It was left on my doorstep but thankfully it was a rare sunny day and the box was in perfect condition.