I was not a huge fan of the Lyja story, but I really enjoyed his run up until Reed and Doom's deaths. I thought it was a lot of fun up until then. At that point, the quality of the stories went downhill until he brought them back. The low point being the bad "Nobody Gets Out Alive" story which I thought was absolutely terrible and a waste of paper.
So for me, I have both good and bad opinions depending on which part of his run is being talked about.
I think I could say I have good and bad opinions on every single FF run there was, including Jack and Stan's run.