Just finished my first season as Man United with this tactic. Didn't even have the proper players in DM (using guys like Phil Jones and Fellaini most of the time), but still won every single title.
The tactic is really good. What impresses me the most about the tactic is the defensive display. I only played with the super favorite tactic, nothing else. The goal difference was not insane, it was decent. But the defensive record, holy ****. I simply don't concede goals from anything else but the opponents set pieces (corners/free kicks/penalties).
Unfortunately I don't have screenshots, because I quickly forwarded to the 2nd season after finishing the first, so you'll just have to take my word for it (I have written more than a few lengthy reviews on this forum). But this is seriously my favourite as of now, and I won't be changing a tactic before a new patch release.
Thanks for sharing this with us, TheWibe.
PS. This thread deserves 5star, too bad most people prefer a 4231 with central mifielders (and not defensive). Because they are surely missing out on one of the best defensive tactics you can find around. Please, note that I'm playing with a strong side (Manchester United).