Hi I got my Open Water Certification through Sea Lions in Hanover Park. They are right off the Elgin-O’Hare and Lake St. I think they did a pretty good job and were more than fair with pricing. I really like the instructor that I had and he took some extra time working with me on skills that I could not pick up right away. He is still one of my dive buddys and we go out diving as much as possible. If you need more info on the shop or the instructors let me know.