I like modules with time crunches that still allow optional resting. This module can be heavy with flavor if the DM makes sure to include the lore of the place in their descriptions and let people explore the rooms. The drow encounter is always interesting and no two groups approach if the same way.
A word of caution though: at this level, players do have options to just skip to the end door, and I've seen groups do that it several times. They miss out on a whole lot. You've also got to spell out what exactly they need to do and make sure they're paying attention.
[5 of 5 Stars!]