Affinity was met with critical acclaim.
Metal Undergrounds Ty A. praised the band for achieving a smooth "combo of the metal and prog elements", but criticised the album's second half for not being as strong as the first. Michael Klaas, from
Metal.de, called it one of the most captivating prog metal albums in years. In a review for
AllMusic, Thom Jurek compared it to the band's previous work by clarifying that it's "less dense than
The Mountain musically, but no less sophisticated. The textural scope is wider and considerably brighter. The striking harmonic sensibilities in these songs are marked statements of how prog is capable of attracting those listeners who aren't predisposed to it, but more than that, it's great fun to play." Writing for
Sputnikmusic, Thompson D. Gerhart praised the album but was not as impressed as he was with
The Mountain, stating that "while the group execute with precision on the dystopian, hacker-y concept dreamed up for
Affinity, the broader space for dreaming on
The Mountain seems to have allowed for more big and sprawling ideas to come forth and flourish, while it's the quick hits that deliver the statement of
Affinity most articulately". The
Ultimate Guitar Archive team praised Haken's songwriting and the unity among members, but called Jennings's vocal work "restricted" for relying too much on his
head voice.
Progressive Music Planets Rob gave it a perfect 10/10 score and called it "a clear contender for album of the year". He also said the album "gets better with each listen" and that it is "Haken's best batch of songs and the best mixture of their influences too".
When Prog and Power Unites Nick said the album may not replace
The Mountain as his favorite Haken album, but it "comes very close". He praised Diego Tejeida's keyboard work and his ability to take "the demands of the 80's style". ==Track listing==