[7] It is the third and last studio album recorded with bassist Pete Denton, whose departure from the band was announced on 3 January 2019.

[4] Luke Pritchard had already begun talking about the Kooks' fifth album in 2017 while promoting the band's greatest hits compilation, The Best of...

[10] Pritchard stated that he was on a mission to write the best songs he had ever written before bringing them to the band, citing Rubber Soul, Lola and Definitely Maybe as inspirations.

[12] In AllMusic's review, Neil Z. Yeung called it "a mostly tame affair packed with patient groovers and some lush production" although he was slightly critical of the album's sentimentality, feeling that "it gets bogged down by the contemplative exercises, but resuscitated by the festival-sized anthems punctuated throughout".

She was critical of the band apparently playing it safe; "Let's Go Sunshine scarcely veers into experimental territory, and as a result, the tracks lack unique characteristics" and went on to criticise the album as "boring", stating; "While collectively the songs are happy-go-lucky, giving off a carefree tone, at 15 tracks, Let's Go Sunshine gets boring quickly".