I didn't vote because we use Simply Spelling (from Shoelace Books) and I wasn't sure what category it fell under.
Never-the-less, I and my ds's have never been more pleased. It incorporates so much through copywork ~penmanship, grammar, punctuation, form, diacratical markings, syllabication, and spelling (;)), not to mention wonderful Bible verses, prose, quotes, and more that are effortlessly memorized! And, it's a one-time purchase for the whole family.
I also love that it's easy to implement. They copy four days and dictate the fifth.
It's, without a doubt, my favorite purchase of the year!