Use 'creditable' when the outcome is good, showing respect for the effort or result. Despite the challenges, their project's result was quite creditable.
Pro Tip 2/3
Unexpected Success
'Creditable' often implies success was not guaranteed but efforts led to positive recognition. Her presentation was unexpectedly creditable to the audience.
Pro Tip 3/3
Not the Best
While 'creditable' is complimentary, it may imply that the accomplishment isn't the top achievement. He gave a creditable speech, though it wasn't the best of the night.