Pros: Inexpensive; Entertaining, Works!
My 6 year old gifted son is 4 lessons away from finishing Click n Spell. It is a WONDERFUL program! I'm going to miss having him do his spelling on the computer, lol. He started already knowing how to read really well (at least 2nd grade level) but not knowing how to spell and it was frustrating him. Click n Spell is entertaining (without being TOO fun); I love the reports it sends; and the best thing is that it works. It is also not that expensive considering it covers 3 or 4 years of spelling lessons.