I feed two of the boys TOTW. Jules has been eating it for well over a year and Grimm has been eating it since we brought him home (he's 10 months now) and they both look fantastic.
Aesop eats a mix of TOTW and Natural Balance lamb and rice...he gets the gross poos if eating strictly a grain free food, but he likes the taste and won't eat if there isn't some in his dish
The mixture of the two seems to do well..keeps his stool fine and keeps him eating
Ginger has eaten a variety. She has megaesophagus, so can only have very small kibbles (she ate a canned food gruel for over a year before deciding she no longer wanted canned food and refused all but kibble) She was eating Halo's salmon formula, which she enjoyed along with Aesop, but now that he switched the kibbles are too large. So I'm going to go kibble experimenting to find something with tiny bites.
ETA that they get raw treats and as meals once in awhile.