There is nothing like putting a window close to an intersecting wall with a shiny paint and having direct sunlight showing wavy walls (not due to bad butt joints in the drywall).

I have heard that there is some compression and/or lifting of some of the block systems, but I have not heard if the amount is a measureable amount. Not sure if that is possible with vertical ICF systems but if anyone has any experiences, I am interested in hearing about which systems have them.