I pressed all my seams open and definitely found more perfection in those matching points. Plus the block lays nice and flat.
I want to mention the iron that I use. I brought it on retreat and after using it 6 people went out and bought one. Yes, it's that good! I've been through many irons in my quilting life and I'm pretty tough on them. This one has lasted me at least 5 years and works beautifully. It's by Reliable and has a unique feature - a separate water tank that makes the steam. Water never goes into the sole plate of your iron to steam up. No spitting - ever! It's heavy, hot, steamy and well - reliable. If you're looking for a good iron - I highly recommend it!