About 100 pages into the Dragonbone Chair by Tad Williams, so far not too bad. Its my first forray into a Williams novel. A bit formulistic, a young boy is being mentored by a wise doctor, a king is dead and his sons hate each other, and one of the princes has a seemingly evil advisor. Another thing I've noticed is that there are a lot of words to say a few things. All in all though the story is rather enjoyable. It gets into a lot more detail than other standard fantasy writers which is nice.
Ah, I tried to read The Memory, Sorrow, Thorn, series a couple of years back, but sadly never could bring myself to finish it. When I finally admitted defeat and gave up, even though I was up to the beginning of book three by then, I must confess that it was with a sense of regret.
In terms of writing description, Williams is an author I highly respect. I wish I had his talent. He never fails to really capture the atmsophere and throws the reader right into the middle of the action. But his problem, for me, was that he writes just a bit too much description. I think Williams is an extremely talented writer, but because he tends to want to describe everything down to the slightest detail, it started to get tedious for me.
I read his Otherland series, and found it became very tedious in places because of this excessive description. I also read War of the Flowers (I believe that's the title...?) and found it suffered the same problem. I manged to get through Otherland because the overal plot and characters interested me, and War of the Flowers because it was a standalone and (again) because I was interested to see where the plot was going. Memory, Sorrow, Thorn did interest me, too, but I'd struggled with book two; it took me three tries before I managed to finish it, and by then, when I started having the same problems with book three, I decided I needed to stop.
In my opinion, Williams is not a flawed writer, and the Dragonbone chair is a very enjoyable book. It sticks out as being my favorite of the series, not just because it was the one that I got through without struggling too much. It had a dark, "hero loses everything" type theme that I rather enjoyed, and the conflict was interesting. Though Simon (the main character, I believe?) started to get on my nerves occasionally - he was a bit too whiny sometimes.
I hope you enjoy the series more than I did though, my friend utterly loves it, and still hasn't forgiven me for giving up on it.
Edit: Oh, and to agree with what Draxinusom said; Dragonbone Chair did take a while to get going for me too. I don't remember at what point, but I think it was more like around the 250 page mark. I did become quite engrossed in it for a bit after that. It's just a shame my enjoyment of it didn't last - though I tried!