Personally haven't done this course or any similar and I don't know anyone who has.
There's definitely merit in the course if your CPL training didn't get you in a 200-series or didn't leave you feeling confident with charter realities up north.
It might show you a thing or two skills/knowledge wise... but the best thing it might get you is networking which is arguably just as valuable as experience when getting a job in GA!!
Sorry, more questions than answers but no wrong answer here. Best of luck, it's tough starting out!