There are also a bit cheaper alternatives like Cubo from Livique or Flexcube from Micasa. We have actually some shelves from Interio which unfortunately does not exist any longer. We would like to add extra pieces. Furthermore different series have some different pieces that suit my needs so would be great to be able to combine.
I am wondering if these very similar systems are compatible with each other, i.e. if it is possible to build upon e.g. Cube with pieces of e.g. Flexcube.