"Let's Go to Bed" received generally favorable reviews from music critics, many of which called it the best song on "Now... Us!". Joachim Gauger from Laut.de declared the record the sole "really strong song" on "Now... Us!", while Matthias Eisen from CDstarts.de found that it was the only song above "sophisticated average". Music magazine "Musikwoche" called "Let's Go to Bed" a "racy but modern R&B track" with a quality distinctly above the songs on previous album "Elle'ments". Less enthusiastic, Abini Zöllner from "Berliner Zeitung" wrote that the track felt like "no surprise".