Ok so i have varied opinion on this. IKEA is great for getting some stuff quickly and you know what to expect.
The big problem I have with Ikea is it creates a sort of disposable Furniture Industry because quite often people will throw their Ikea Stuff away after the first or second moving. Or not even take it with them. Because it is so easy to get and so cheap.
Well, because of wide availability, it allows to get a kid room for cheap and with consistent style over time always buying second hand.