10 minutes?
Sadly...that's probably not much of an exaggeration. The DM tools are pretty basic. Pretty, at some points, but very basic and very samey.
Randomly generated dungeon. Place chairs, crate, lamp, blood pool. Creatures are pre-set and level scale, so no trying out there, just jam them down (But only from two creature sets per dungeon, ie. Undead and Goblins. Or Mercenary and Spiders). Quests are quick shot, twitter length (Literally, character limits on quest text) descriptions, no dialogue to write (Because there is no dialogue in DM tools) Place markers on a little chunk of the northern Sword Coast, or the corresponding Underdark location in their map and link them to your randomized dungeons. Jam players in. Done.
The tools feel like they -could- have been worth something, but currently, they're just not.