Interesting thread! I was going to post this question tonight; I am a long time quilter (since the early '80's) and have always pressed to the side. I'm starting a new project soon that says to press the seams open. My question to the group was going to be "What's the difference?" but you all have answered me very well. I now know that it will take longer and burn my fingers (I'm a klutz!) to press them open so I will try it but will return to the tried-and-true pressing to the side when I get tired of the new way.....Thank you all!!!!!