I used the disappearing 9 patch for my first quilt. It came out ok. I would not suggest that to anyone else for their first. There are easier quilts that look fine for the beginner. There is still lots of matching seams in it. The problem I found with the d9p is that all my squares were different sizes, so, I had to do the squaring up thing. Also, I had planned to have it look like the second top, but it wasn't even enough to do it that way. So, I had to lay it out another way. (The combination of mis-cutting and missing my 1/4 in. seam was the problem.) Not all the seams would nest when I cut and rearranged. Everyone says to press to the dark side, but when you rearrange the blocks, it doesn't always work.
I found it much easier to sash the blocks than do all that cutting and rearranging which is how I did my second quilt, on which I just finished the top. I still spent a lot of time with Mr. Seamripper, but it was easier to fix than when you did it as a disappearing nine patch.
bkay
My first quilt, followed by the top of the second: