I thought the Yoda book was a good, fast paced, and fun read. LOE was a good bridge novel between AOTC and ROTS, and it helped me understand ROTS a little better. I didn't find it boring at all.
As for the ROTS novelization, I didn't care for Stover's writing style. With lines like "This is what it feels to be Anakin Skywalker right now", that took me out of the story. Why not just describe his feelings without announcing them. The beginning was boring too. It was okay, but I'm not in the chorus that praises it. I do think it added some nice internal dialogue/character moments, particularly for Dooku, Anakin's gripes with being denied Master status also made more sense due to the novel, and Anakin got some nice characterization too.
I would recommend it, but at the same time it's not the greatest SW story ever written. I also recommend the follow up book, Dark Lord, written by Luceno. Really, LOE, ROTS, and DL play like a trilogy and I believe there is an omnibus with all three novels.