My avatar is one of the 12 blocks I did from Pieces of Baltimore. They were not hard to piece, just many small pieces to keep organised. I learned the importance of accurate cutting and seam allowances.
Here is the link to the last block of the 12 I completed-
http://www.quiltingboard.com/t-36595-1.htm
I still haven't pieced the top yet because the border has like 34 or so pieced flowers that I haven't made yet. Her patterns are a LOT of work, but I will be very proud of it when it is done.....someday!