I used it years ago. Initially, I didn’t like it for the primary grades. It was repetitious and had minimal practice problems. And fussy…the “workbook” was just a bunch of sheets stapled like Scholastic catalogues……for every single lesson. You had to pull apart 20 leaflets every day. I thought it lacked depth. But, after using it for a few years, I learned where I needed to supplement, what to leave out, and what worked.
The K-2nd teachers (me included) really didn’t like it, but the upper grades did.
Don’t know how much it has changed. In retrospect, it was better than Bridges.