I just got the book and am making the maternity/nursing top. The design is so cute and really functional. My only problem is that I think I may have come across a few problems in the pattern, some of which were not fixable. The pieces in this pattern are all rectangles and I think for one part, the orientation (cross-wise or with the grain) is not given correctly. Once it's cut however, there is no re-doing it without a trip to the fabric store! I was able to finagle it because the print I was using was pretty forgiving but it's a serious flaw depending on the print.
I also thought the lengths didn't end up all the same - I had to cut some pieces to create a straight hem in the end. Not much of a problem however the top is already fairly short. My attempt at lengthening it (using the 'long' direction from the larger and the 'wide' direction from the smaller pattern) was foiled by the aforementioned flaw where the orientation was wrong. Not a big deal - once the shirt doesn't cover my belly anymore, I will just wait to use it as a nursing top.
If you're tall, I definitely recommend figuring out how to make the top an inch longer.
I still love the book and will make the mariposa dress next - I wish I could have found a fabric as cute as the one in the picture, but I had to resort to something less special. I might updated my review based on the next project...
Update: I finished the mariposa dress today. Again, I had a problem with the pattern - this time the width of the skirt back panel and the bodice back panel didn't work out to match after cutting the hip shape as instructed. I don't think I messed up. I could still work around it though. There was one typo in the instruction referring to step 38 instead of 39, which was a pretty obvious one yet disastrous if not caught.
I am currently 32 weeks PG (and currnetly 167lbs) and the dress in the S/M size barely fits my belly. I made the dress an inch longer and I wish I'd made it 2 more inches longer. I am 5'8" which makes me sometimes 'tall' but mostly 'regular' in store sizes. This is not a serious flaw, just something to be aware of.
Something else I noticed is that when they say 'line up the notches' that you cut to mark the orientation in the pieces (e.g. when putting in the sleeves) it just means to put them together so the notches are on the same side. If you tried to actually match these notches, you'd end up with a mess. I usually sew of European patterns which are altogether different, so I am not positive this is really a flaw. But I am used to have the notches actually match exactly, so this was disconcerting and I am glad I went with my gut feeling and didn't line them up exactly.
Overall the dress came out cute, and I have gotten compliments on it. I took only 1 afternoon to sew (after cutting the previous day), and it's really a neat design.
Update#2: I have now made the hooded toddler jacket as well as the reversible toddler pants from this book, both projects went off without a hitch and came out TOTALLY ADORABLE. Lots and lots of compliments on the results. I wonder if I will figure out how to post a photo. This book as proven itself totally worthwhile and I think I will continue to use the patterns in it a lot.