Is it possible to replace the screen in a retina display assembly?

I have read on one occasion that it is extremely difficult to replace the screen in a retina display assembly of a MacBook Pro 15, 2012, or 2013.

The screen assembly is very thin and looks like a bigger MacBook Air screen assembly and disparagingly difficult to replace.

I have seen on eBay and several online outlets that sell both the complete retina display assembly as well as the screen only, which is about $120 cheaper.

Has anyone have successfully made a retina display screen replacement in to an existing assembly, which has a broken screen?

I am sure I read an iFixit article that indicated that the job of doing so is very difficult and nearly impossible.

I wish to follow up on that and see if I can get an update from iFixit members.

If you have been successful, please share your experience and write on this thread how you did it. Any link to an existing instruction will also be dearly appreciated.