I use it, and we love it.
It uses the words from Scott Foresman Everyday Spelling. If you buy the online spelling without enrolling in a full grade level program, the spelling workbook doesn't come with it, so you'd have to purchase it separately if you wanted it.
On day one, the program gives a pretest and then has the child correctly type the words missed. Day two is a review of the focus of the chapter (words with thr,scr, squ, words with kn, gn, wr,mb, etc.). Day three is game playing with the spelling words (spell the words with scrabble tiles, click on the correctly spelled word, and so on). Day four is the post test. Day five has the kids write a little story using spelling words, but we always skip that.
Hope this helps!