This is a very (or: completely) satisfying/satisfactory conclusion.
When there's no adverb of degree before these two adjectives, it is easy to understand them because I think 'satisfactory' means 'good enough or good as required'. But when adverbs like 'very', 'completely', 'entirely' or 'perfectly' is put before them, are they still different in meaning?
According to Collins COBUILD Dictionary on CD-Room 2006:
Something that is satisfactory is acceptable to you or fulfills a particular need or purpose.
I never got a satisfactory answer...
Something that is satisfying makes you feel happy, especially because you feel you have achieved something.
I found wood carving satisfying.