I bought these for my wife, after years of her talking about the pros of "Scandinavian bedding". I'm a typical dude, and just figured blankets are blankets. Boy was I wrong. This concept is fantastic. First night, (thinking pffft, it's just a blanket) upon crawling into bed I realized almost immediately how great split bedding is. I can thrash about, crocodile roll, pull the duvet up around my face just how I like it, go to the bathroom, etc, without any concern of disturbing my partner. On top of that I simply sleep better. I have dreams now, and I swear before the change I never did. The duvet with the heavier insert, lays over you lightly like an envelope of warmth. Our bedroom is normally low 60s at best, and I'm usually covered in multiple tangled heavy blankets. With just the duvet, I'm comfortable all night. I'm a night owl, and delay going to bed like I expect to never wake. After making the change, I'm headed to bed earlier, and look forward to it. In the AM I don't want to get out of bed. It's like being in a warm bath.
On top of all this, customer service was stellar.
This review probably sounds like alot of hyperbole, but it's hands down one of the better purchases I've made. Highly recommend.