I don't recall any games where he was terrible. There were a few games where he wasn't as effective as others, but he wasn't terrible. I like Barea. He's a very good basketball player who only has one negative. He's short! Thats it! For his size he a pretty good defender, the word pesky springs to mind. But he's outstanding at penetrating and breaking down the other teams defense, expecially in man coverage. The games in the playoffs where he wasn't as effective were games the opposing team went to a zone defense. But in general, he's very effective. He's a good spot up shooter, and a good passer as well as having a variety of shots around the basket.
Having said all that, I'm glad he signed with Minny. Not because of what I think of him, but because selfishly, I don't want Jimmer's minutes screwed with, and they would be with Barea on the team. If the Kings aquire another PG, then I want it to be someone that will play behind Jimmer, and not comptete for his floor time.
I know a lot of you haven't really seen Jimmer play very much, if at all. I think you'll be surprised. At BYU, he had little or no space from the moment he touched the ball. He was double teamed every game, and sometimes triple teamed. I think he'll find the spacing in the NBA to his liking, and some of his game will actually be easier for him than it was in college. In all the games I watched last season, I can only remember a few times when Fredette didn't have a hand or two in his face while shooting. I can count on one hand the amount of times he had a wide open spot up three, and a couple of those were from just across the halfcourt line when no one had picked him up yet.
So from my prospective, I didn't want a Barea here interfering with his development.