His musical influences are the Rolling Stones, especially Keith Richards, Rory Gallagher, as well as Eric Clapton, the Dutch band Golden Earring and Gary Moore.

He was mainly responsible for BAP's musical style and wrote music to many hit songs including Verdamp lang her [Damn long time ago], Frau, ich freu mich [Woman, I'm glad], Ne schöne Jrooß [Best regards], Kristallnaach [Crystal night], Alles em Lot [Everything's alright] and Nix wie bessher [Nothing as before].

When BAP paused for a while in the late 1980s, Heuser spent some time in Los Angeles, USA, where he lived in Roger Taylor's (from Queen) house for some while.

[1] On 17 February 2006, he released Major & Suzan, a collaborative album, which was recorded with Berlin singer Susanne Werth (from Wasteland Green [de]).

Matthias Krauss (keyboards) and Mario Argandoña [es] (percussion) joined the band on the first studio album Men in Blues, which was released in Germany, Austria and Switzerland on 3 February 2012.

The plans had to be cancelled in 2013 when Heuser suffered a nerve illness in the middle finger of his right hand, so he could no longer perform at the necessary level of accuracy.