Dear fellow perfectionists, 
This is the kind of product where you can't let perfection get in the way of good enough. Most peoples walls are at least a little warped and so it will difficult to achieve an exact line up between sheets, but the overall effect is gorgeous despite the inconsistencies. 4 stars because the product can be difficult to handle at the ceiling/corners. Also do not pull or tug at the product at all in an attempt to line things up - this can cause the vinyl to warp and you will waste it. The product is actually fairly forgiving if you need to reposition several times over. Would absolutely recommend. I love how my daughter's room turned out