Product review (5 stars): hand tight is not good enough. Get the wrench and really crank it ...
Our kitchen does not have the space to install a full size dishwasher.  While this unit is not tiny it uses up an acceptable amount of counter space.  Especially since it works so well.  I will say that when you install the hoses, hand tight is not good enough.  Get the wrench and really crank it down to make sure there are no leaks.