I wanted to start off with this the first time we've never had a duvet. I am just going to start off with what I feel would help improve the product overall. The big thing is no instructions. A brief description could've been printed on the back side of the insert. That's the only bad thing to say.
After figuring out how it works was pretty easy. The fabric quality is very nice and and soft. Felt so nice snuggled up to my skin and light but yet warm. 
I am on the fence about the buttons. I liked them overall didn't know if a zipper or snap buttons would be better.
Overall this is very nice and comfortable product.