With the dawn of the 80's came a new Rainbow. Armed with a more accessible sound for the masses and a new, more poppy vocalist in Joe Lynn Turner, the first record to feature this new voice would be their most commercial effort released by the band. The ultra talented drummer Cozy Powell was gone too, and Bobby Rondinelli stepped behind the kit and had some tought shoes to fill. While Turner would be a good vocalist for Rainbow, there are times on this album where he seems a bit off. Pennanen, Timo (2006). Sisältää hitin – levyt ja esittäjät Suomen musiikkilistoilla vuodesta 1972 (in Finnish) (1sted.). Helsinki: Kustannusosakeyhtiö Otava. p.166. ISBN 978-951-1-21053-5. The biggest hit was another Russ Ballard penned tune, "I Surrender", an absolutely embarrassing number. "Since You Been Gone" worked because it didn't' take itself too seriously, with it's tongue in cheek lyrics and inserted clapping. I Surrender has none of that, it's completely serious in its melodrama, and Turner's way over the top and exaggerated vocals don't do it any favors. Makowski, Pete (25 July 1981). "Hotter Than July". Sounds: 14, 15, 48 . Retrieved 11 December 2013.

After a failed attempt to get Ian Gillan to join Rainbow, Ritchie reunited with Roger Glover and brought in Graham Bonnet for Down To Earth. Graham didn't last, but the album had brought Ritchie the commercial success he wanted, mainly with the Russ Ballard penned "Since You Been Gone". Graham Bonnet says that work on this album began when he was still in the band, he even recorded the vocals on "I Surrender", but Graham left the band and was replaced by Joe Lynn Turner. Erlewine, Stephen Thomas. "Rainbow Difficult to Cure review". AllMusic. All Media Network . Retrieved 11 December 2013. Your computer may be infected with malware or spyware that makes automated requests to our server and causes problems. As I said in the beginning, there are times when Turner sounds a bit off. On "Magic," he is just trying to hard to hit that high note in the chorus and seems a bit forced. In general, his voice is actually just a bit too high. Some of the verse parts "I Surrender" and "No Release" seem like they are supposed to be a bit toned down and lower as Turner's voice control is not there. At other times though, he sounds brilliant, like on "Can't Happen Here" and his voice flows well on "Freedom Fighter" as his voice goes from reserved to full blast and is the highlight of that song.Offiziellecharts.de – Rainbow – Difficult to Cure" (in German). GfK Entertainment Charts. Retrieved October 17, 2023. Bonutto, Dante (6 May 1982). "The Rainbow Story Pt. 2". Kerrang! (15): 22 . Retrieved 11 December 2013.

Oricon Album Chart Book: Complete Edition 1970–2005 (in Japanese). Roppongi, Tokyo: Oricon Entertainment. 2006. ISBN 4-87131-077-9. Rainbow presented with a gold disk in Tokyo, Japan for Difficult to Cure (3rd February 1981)". Facebook. 20 December 2020. Kent, David (1993). Australian Chart Book 1970–1992 (illustrateded.). St Ives, N.S.W.: Australian Chart Book. ISBN 0-646-11917-6. Ozzy – The Real Story: The Album Covers (Mojo 2005)". gilmourdesign.co.uk/ . Retrieved 13 January 2021. Popoff, Martin (1 November 2005). The Collector's Guide to Heavy Metal: Volume 2: The Eighties. Burlington, Ontario, Canada: Collector's Guide Publishing. p.279. ISBN 978-1-894959-31-5.

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