Did one at a shop in Knoxville when I first started quilting. I picked the primary fabric and the instructor picked the rest of the fabric. Instructor had all the pieces cut of and sorted in a colored bag and asked that we not 'look' ahead so we only knew what the additional fabrics were as we reached that step in the lock construction. Had a good time and it was beautiful. I did not pay attention to the finished size (which was maybe 72X72). After construction, I sent it to a LAQ and then decided to 'grow' it into a queen size. When finished, I was very pleased, but could never have increased the size without the help at the shop.
Best part as a beginner, it took the choice of colors,fabric out of my hands (which I really dither over) and all pieces were cut for me!!