Note, I only tried them once (tourist from the US) I ordered the kakimaze don which includes two types of tobiko, ikura, squid, salmon, tuna, eel, uni, and a poached egg. I am probably being particular, but the fish was haphazardly chopped so that they were in pieces but a few were still strung together and I felt like they put way too much egg and not enough fish. I would have much preferred if the fish was served in sashimi style slices (a la chirashi) than the little chunks. The quality was not exceptional and other than the wide selection of donburis there is nothing exceedingly special about the menu.
Nevertheless, it's tasty but it wouldn't be something I'd order again.