Well, when we started reviewing for the crew we were told to be honest.  Here goes……………..Spellquizzer just wasn’t my cup of tea.  Primarily since we don’t do a whole lot of spelling formally.  We go over words in his literature/reading vocabulary wise, but do most of our so called “spelling” as a corrective process within his writing.  That being said, Spellquizzer is an online program that as a parent you can plug in your child’s words for the week and it creates games & activities to practice those words to master them.  Is it a good program?  Probably, but without using it (which didn’t fit into what we do) I can’t back it 100%.  My best suggestion would be to head over to the TOS Crew blog to see what other crew members said about it or go check out their site yourself to see if it may be what you’re looking for.