I agree with you about Strange and Norrell. The pacing was poor and it was over-long.

But!

Susanna Clarke’s next book, Piranesi, is actually really good. Like, really, incredibly good. I recommend it to everyone and so far no one has said anything but positive things about it. I rarely re-read books but this is one that I’ve come back to.

As it happens, I read Piranesi first, so I found JS&MN a bit disappointing, but I’m glad I read them that way around otherwise I might have skipped Piranesi, and that would have been a mistake!