I've been wanting to try it since hearing about it from this wonderful board. Bought a big spool at Red Rock and couldn't wait to finish the spool of Mettler I had on my machine. Well, it happened yesterday! Filled many bobbins and finished my piecing on the current project. What a difference! I'm a convert!
I notice that there aren't many places that sell the big spools and I wonder why. I don't really need all the colors and I like the convenience of the big spools.