Fact: It is a full sized (12 inches square) LP replica cover with a standard CD inside. A full size copy of the original vinyl cover.  The CD is mounted on a piece of cardboard which is slotted into the sleeve instead of the vinyl. It is also known as a "Deka-Jake" ("big jacket").

Opinion (by sam2095): Disappointing marketing gimmick. 

I have only bought one of these, as much to see what it was like as anything else.  Goodbye Yellow Brick Road as pictured.

I didn't expect too much and even with that scepticism I was disappointed.

It's exactly the same as if you'd found a mint version of the original LP cover, bought a standard issue CD, mounted it on a piece of plain white cardboard and put it into the cover where the vinyl used to go.

To be fair, it's not that easy to find a mint condition LP cover - but then I suspect that there is a parallel vinyl release when these come out so you may do better to buy that (likely to be more expensive I guess).

The most disappointing thing about what I bought was that the plastic cover that it's housed in has the sticky surface on the flap and not on the bag outer.  In this way, when you go to put the cover back into the plastic housing it sticks on the flap... Very poorly thought out engineering.  Also, there was no obi (not too important to me but I thought it worth mentioning).