I was in the camp of "why bother" until I tried printing my first 20" x 30" enlargement. After two days of working on getting good exposure, dodging and burning, then processing and split-toning, I got what I thought a perfect looking print. I then spent some money to mount it and hung it on the wall. Only then I noticed that when you get real close, it is obvious that the center is perfectly sharp but the edges are slightly blurry. That same week I bought Versalab Parallel. From that point on, any time I print bigger than 8x10, my first step is to check alignment. No more uneven sharpness for me. When you pay attention, uneven sharpness looks even worse than blurry all-over. Make your own conclusions.