I have used Daily Grammar with all my 3 children. We use it together with Bob Jones Grammar. Bob Jones has very thorough grammar. However, Daily Grammar gives them a chance to review basic grammar concepts on a daily basis. Daily Grammar is a good supplemental grammar especially for quick and easy review.
The Daily Grams guided review has answers in the back of the book. The Daily Grams student is an exact copy of Daily Grams guided review but does not have answers in the back. So I buy the Daily Grams guided review only once and for the rest of the children I buy the Daily Grams student book (which is half the cost).
The Daily Grams are an excellent way to reinforce grammar skills. I hate to give it less than 5 stars for quality, because they are very well-written and worth the money. However, I've dinged it by a couple of stars because I have had a hard time finding answer keys for the teacher -- when it comes to the Daily Grams. (Yes the rest of the system provides answer keys wonderfully!) It would be so nice to have a quick and easy answer key in a separate book for the little Daily Grams excercises.
We have only had this product a couple weeks, but I think it has been a wonderful, easy to use addition in our language arts/grammer program. It gives my son something he can do fisrt thing on his own and he actually enjoys the worksheets because they are short and give clear directions. The sentence combining is great practice, and all the short grammer reviews have been very helpful. We will definately be using this curriculum for years to come. Painless grammer review, I wish I had found it sooner!