Wizard's Amulet, printed out the Pregens and we were up in playing in less than 20 minutes.
The adventure focuses on Exploration and Combat and outlines what each Scene is designed to for and guidelines and story to use if you need it.
We only made it about two-thirds of the way through in a two hour period, but I highly recommend the adventure for DM's.
Prep time is fast and the PDF is well organized to ease the DM's job. Encounters have some options and both boxed text to read aloud and plenty of information to use or ignore.
The Pregens are all well thought out and encompass more than the four classes of Basic D&D, but their presentation is my biggest criticism. To conserve layout space, I'm assuming, the characters flow together on the pages (instead of having 1 or 2 characters clearly delineated per page) and this can means pertinent information, including stats may be on less than 1/4 of the next or previous page.
My solution was to cut them up and paste them together, so with all that we were still up and playing within 20 minutes, which isn't bad.
I really recommend the Wizard's Amulet (it's free after all) and also think you should check out Necromancer Games' 5E Kickstarter.
Between Basic DnD and the Wizard's Amulet you have everything you need to star playing 5E right now, in less than 20 minutes!