I've been to Makimono once. The food was okay, but they didn't have a very large variety of food compared to some other Japanese buffets i've been to. It took about 15-20 minutes for someone to take our order after my friend and I sat down with the menu, and they continued to take a long time to come back to take our orders after we'd finished what was on our plates (the restaurant was virtually empty when we were there, so they weren't busy helping other customers).
My boyfriend seems to really like it, but he doesn't eat sushi so he goes for the beef rice and things like that. He eats at Makimono from time to time, but I decide to eat at home on nights that he goes to Makimono with his friends.