I got the Valentine's Mystery put together. Ended up deconstructing the original 6 blocks and swapping out the scrappy white for 6" solid blocks. I used the 2.5" squares for the border, and only needed a few more to have enough. I cut more 2.5" pink and mixed them into what I had before. I had just ripped apart 30 rows of 3 blocks (for a 9 patch) that I'd messed up so I had a day of a lot of quality time with my seam ripper!
Over all, I like how this turned out. My problems were more due to changing things around than with the instructions. I went way more scrappy than what is in the original design.