I just had the experience of spending a whole weekend ripping out 200+ seams. My blocks weren't lining up so I had to rip out about 5 seams or more on 40 completed blocks. They now play well together...........LOL. It was worth it, despite what everyone else said...."I would have tossed the project!!" I just couldn't toss it. It is for a dear friend and it's her colors so I had to plug on and finish. I only have 52 more blocks to go!!!!