I've got one, been using it over the last winter and pretty much live in it to be honest. Only thing it doesn't have that I would like is a chest pocket, but that's just a small niggle.
Works well, the heating panels are on the back, but the warmth spreads around nicely when it's under another jacket. There is a small velcro pouch in the left pocket where your power bank connects, the connector I found isn't the tightest, so can work loose when walking around. Also if your power bank is too large then it won't fit in the pouch either, so will just have to sit in the pocket itself.
I managed to get it on sale for about £80 and despite the little issues I'm very happy with it.