"I have two of these shelves in white/oak, and they're just what I was looking for. Sure, they're more expensive than the units you can get at Ikea, but you can tell the difference in quality. Last time my mom visited (oh, prequarantine life), she actually asked if they came with the apartment because they fit so well in my living room." —Chelsea Stuart, BuzzFeed editor
Promising review: "I love this shelf! I needed something tall to fill empty space and store books and plants. Each shelf is very heavy duty, so I can't imagine any bowing would occur in the future, unless it's got too much humidity. Before we put weight on the shelves, it had gaps between itself and the wall, but it balanced itself out after adding books. I HIGHLY RECOMMEND this shelf. It's definitely going to last longer than anything you could buy at Ikea, and it has VERY little wasted/unusable space. Just do it! I put it together myself, but I had to hold it steady/leveled while hubby secured it to the wall. It's not impossible to do alone, but get a second person to at least hold it still for you." —Mrs K3NNYB0Y
Get it from Amazon for $129.99+ (available in four sizes and 21 colors/finishes).