Got tw of these sets on a major sale and am so impressed. Very sturdy, good color. You can easily keep the together as a set like i did in the entertainment room, or break them up like I did with putting the boom shelves in my office. 

The bookshelves are very easy to build. I recommend starting with the top inner shelf because you can sit in between the rails and work your way down. Easily built 1 in 1015 mins

The tv stands were overall easy to build too, just takes a bit of time and you definitely want two people when it comes time to piece things together.