Product review (3 stars): May work for you
Although we purchased this product, we did not like the instructions for attaching it to granite. It requires the use rubbing alcohol to clean the granite or surface, and to clamp it for a specific time frame.  Because it sounds (to us) as if this may not be a solid permanent attachment,  we elected to use the EZ dishwasher bracket instead (installed using screws) and are very happy with that.  Still, this may be a choice that works for you if you cannot attach screws to adjacent cabinets for a bracket.