Sal Cinquemani wrote for "Slant Magazine" that "the singer's classic rock influence (and devoted recreation of it) is once again evident on Lenny, with tracks like "Yesterday Is Gone" and "A Million Miles Away" recalling the crisp harmonies of John Lennon and the electric guitar riffs of Jimi Hendrix." "Billboard" wrote that "It's an invigorating, electric blend that is pushed over the top by lyrics that are smart and spiritual without ever pressing too hard." "Blender" commented about "its 12 tracks", writing that "they are unusually raucous and raw, as Kravitz finds a comfort zone with turbocharged punk and arena rock." "Rolling Stone" perceived that "Nothing on "Lenny" can match "Again", but he gets close sometimes, lumbering with a meatball sense of purpose that's all his own." While "Q" magazine concluded that "As before, it's a heady swirl of rock, soul and hippy lyrics. However, it feels fantastic and, unless the record company is snoring soundly, it's full of hits."