The toilets are attractive but have several issues.  First, the back of the tank is slightly curved for reasons of style.  This pushes the toilet 1/4" into the room and causes the waste line not to align with the standard 12" sewer stub-out.  This caused a lot of aggravation to our installer.   We were proceeding to re-box and return the toilet when our plumber figured out a clever work around.  He bent the installation bolts into an S shape, which allowed us to install the toilet and use the wax ring to make a proper seal.  I would not recommend these toilets when space is tight to the rear wall.