They make the most fascinating fabrics with beautiful graphic patterns sometimes with a lot more strong and direct expression than usually seen in clothing and furniture. I don´t think I could use the biggest majority of the patterns in my own small flat, they would appear kind of too much I´m afraid, but in a larger building with large wall areas maybe even in more open levels they look absolutely stunning. In my opinion Marimekko really fits the description less is more especially with a lot of it :)
One strange thing though, there are always white or at least plain selvages with the Marimekko-name written on the patterns and it somehow belongs there even though you would otherwise hide it. But it doesn´t look good when making the patterns sims-vertible, so I´ve had to leave them out most times.
Here is a small collection of the Marimekko fabrics I´ve made for your sims: