The Archer is a beautiful fixture.   The height is great - better than some of the other Kohler comfort height units (my lesson learned:  get the actual measurements - don't just go by the term comfort height).  
What I find annoying is keeping it working well.    I had to replace the cylinder gasket (a pain to do, by the way - I know that it is a form used by many low flow toilets, but still...replacing a flapper was far easier.    The gasket was pricey (could not find at the time in the local hardware or even big box stores).  The process is complicated (thank goodness for YouTube).   And the flush is LOUD. 

I replaced all 4 toilets in the home and will not buy another Kohler - although I have always liked their products - especially faucets and shower fixtures.   I find, however, that other manufacturers are as good (or better).      A pity because I used to only use Kohler products.    Bottom Line:   this toilet is visually appealing, but not easy to maintain.