2. My favorite thing I've bought from Ikea is a Kallax shelf that I use as a TV stand and entertainment center. I think their shelves and storage options are some of the best products.
The Kallax is the best shelving I got from Ikea that I DIDN'T buy. Turns out the Kallax 2x2 unit is a favorite item that people buy as a stand-alone unit or to stack next to, or on top of each other in multiple configurations.
The 2x2 unit is very easy to assemble, lightweight, and
moveable. So much so, that many parents of college students buy them for their kids to be able to have the semblance of a furnished apartment while at college here.
AND when the students finish college and go back home or onto their next chapter in life, these units are easy to pass on because they are so lightweight.

When I first joined my local Freecycle-type group, I was able to snag one almost immediately. It was a brown wood-tone color I didn't want, but I figured could easily paint it. (I never got around to painting it.) It was over the course of the next several months that I found out how popular they are to pass along. I was able to snag 4 more Kallax units, and in white, which is the color I wanted. I then gave away the brown one I didn't want. I now have the four Kallax 2x2 units stacked as a room divider.
It's looks similar to this, which is a Kallax (real) 4x4. I love it!

Has storage, yet is open & airy.