Bought the Zero Blade with my trimmer because I don't have much (body) hair and would prefer to keep it that way. This thing gives a *very* close shave and I'm definitely satisfied, but with that being said it may not be for everyone.
If you're like me and don't have a bunch of hair in the places you're trying to shave, this product will definitely work for you. Even if you do have a decent amount of hair, you can trim it down using the default blade the Beardscape comes with (use the included hair guards as necessary!) and then go over those places again with the Zero Blade.
One thing to note is that I'm pretty sure you can't use any of the hair guards with this thing, so only go about buying/using this if you're familiar with using electric shavers. You MUST have a steady hand to use the Zero Blade, otherwise you WILL nick yourself and it's gonna hurt. I slightly nicked myself once using it yesterday and it didn't even hurt bad, but there was still a decent amount of blood 😅
TL;DR — A steady hand shall rule the land.