They are working out great so far. Very sturdy and quite comfortable too.
I bought the white ones. The only downside to them (hence the 4 stars) is that they are a headache to clean. I got these a few month ago and one of the chairs started to take on a yellow tone. A magic sponge might do the trick though.
Either way, I would absolutely recommend them because it's a great deal, especially to those who like Ikea.