Disclaimer: I turned off partway through the first episode. Britain has a concept of "lads" which roughly equates to the sort of rough-and-tumble verbal jousting and play that young boys stereotypically engage in. This is a "lad" show, not a man show. It's basically a reality TV confection, and not much more.
The format looks nicer in words than in action. James May decides on a series of challenges to be examined during the course of an episode. The idea is that knowledge of how to do these things makes someone more "manly". This sounds really exciting - maybe you'll learn useful stuff like shaving! What are the actual challenges in the first episode, though? Defusing a bomb, pouring a concrete countertop, serenading a lady with poetry, and some other stuff that's already left my mind.
Pouring a concrete countertop would be a great skill, but they don't actually tell you anything about mixing the concrete or setting up the mould. They just show people doing it. Given how heavy and brittle concrete is, you really shouldn't attempt a project this size until you've had practice. This part of the episode can be safely substituted for a 30-second idea video on your local home and gardening network, you'll have to look up the specifics either way.
Defusing a bomb is... stupid. To be fair this is filmed in Britain so there's a non-zero chance for farmers and diggers to discover unexploded ordinance from the war. There's a thread of real concern behind this skit. But here's what a real man does when he finds a bomb: he walks away very carefully, and then when at a safe distance behind shelter, he calls emergency services. Only a hormone-sick "lad" would do anything whatsoever to disturb a bomb.
So that's it. If you're a Reality TV viewer looking for something testosterone-themed, this may be it. If you're a Top Gear or actual DIY fan looking for some serious technical information... maybe it gets better, but the first episode was a no for me.