[10] Alexis Petridis of The Guardian wrote, "You get the feeling Hurts have spent more time making their backstory interesting than their music", and that on some tracks lead singer Hutchcraft sounds like "one of those puppets that advertises Dolmio, but in the throes of a romantic crisis".

[14] Dorian Lynskey of Q magazine also gave a mixed review, stating that the duo "learn all the wrong lessons from the 80s" and calling the album "a depressingly ordinary package of overblown melodies and musty lyrical cliches [...], expensively ribboned with choirs and orchestras.

"[19] Teddy Jamieson of The Herald noticed that the band has "an ear for a hook, but Happiness feels very synthetic (and not in a fun, sci-fi way)" and that "beneath the synthy exterior lurk orthodox song structures, big choruses and a join-every-dot desperation for pop stardom", however he felt that "there are a couple of flashes of wit and intelligence buried in the album".

[20] Sam Shepherd of musicOMH stated that "there's a melancholy seam that runs throughout the album that, in conjunction with the polished production, succeeds in achieving a glacial grandeur to each of these songs" and noticed that "appalling ballads in the shape of 'The Water' and 'Unspoken' will almost certainly be overlooked in favour of the classy sounds of 'Wonderful Life' or the glorious pulsing anthem of 'Better Than Love'".

[16] Simon Gage of the Daily Express felt that the songs are "thoughtful, melancholy and very modern" and noticed that the album has "a real sense of style that's been missing in British pop for some time".

[12] Luke Lewis of NME praised the songs as "fearsomely well-crafted" and "as clean-lined and immaculate as a well-cut suitwrote" and described the album as "billowing, escapist nonsense that raises your heart rate, slaps a smile on your face and sounds godlike when drunk".

[17] Joe Copplestone of PopMatters said that the duo sings "simple lyrical messages of love, pain and yearning that most pop acts could not deliver sincerely if they tried" and claimed that they "have probably released the 'coolest' album of the year", giving it nine out of ten.