Yes. It's fine, while hardly essential.
Take your group of four to six level 3 characters into the sewers of Neverwinter! Find a small cult to Vecna and defeat them! Work for Lord Neverember!
A few nice touches in the dungeon encounters. It's a 15-area dungeon plus an introductory encounter.
Five of the encounter areas have combats. Given the level range, I'd expect it can be completed in 3-5 hours, but as I run combat quickly, might be slower for some groups. There's exploration and the possibility of some roleplaying. (Incredibly, the party can cause one room of cultists to surrender with an Intimidate check! Experienced players might not even try...)
It seems most of use in an ongoing level 1-20 campaign where you use it to seed in the idea of Vecna existing early on, then return to it for the level 10-20 Vecna: He's Really Really Alive Now* (sorry: Eve of Ruin) campaign later on.
To play this adventure first, then fast-forward levels to starting Eve of Ruin doesn't seem particularly worthwhile.
Anything else you'd like to know?
Cheers,
Merric
* Vecna Lives! Vecna Reborn! Die! Vecna Die! - obviously the next one is "Vecna, He's Really Really Alive Now!".