I own that set and added a light kit to it. It’s one of the few sets that aren’t a pain to build with multiple people. The main box has three smaller boxes that are essentially their own set. The ship when complete can be displayed as three individual sections or snapped together. The light kit I bought is also three separate powered systems. I just have them all plugged into a powered usb hub with a splitter. I also liked that the instructions have little facts about the titanic all throughout. Building the outer hull gets repetitive…I did the last 2-3 panels of it from memory.
It sits behind my couch because it is 53 inches (135cm) long and nearly 18 inches(44cm) to the top of the masts. It has a clever pin system that you pull up from the top deck to unlock the sections from one another. It has details in the cross section for the different floors and such. Nothing too fancy but it’s there. It also does have a rotating engine that is hooked to the rear propellers. The easiest way to show where it separates (and more of its scale) is just to post one of legos images.