We tried WG for part of a school year but abandoned the program due to frustration (for both my son and me). It always took us longer than 10 minutes and it seemed to me that this program made grammar more complex than it had to be. It seemed very “public school-like”.
We just finished Junior AG last term and are now using Mad Libs as reinforcement. JAG was MUCH better for us. He still didn’t like grammar, but it was much easier to follow using JAG and we both liked the fact that after 11 weeks we were done with it. Also, the lessons didn’t drag on like they seemed to using WG. He really likes the Mad Libs (to my surprise) and we do these a couple of times a week.
HTH