His solo work is in an acoustic, folk / country genre, described by Tim Peacock of Whisperin and Hollerin' online magazine as "showcasing a fluid finger-picking style and a gentle, unobtrusive voice which nonetheless carries a determined presence.
"[7] Although he left Ophiuchus in 1987, Cousins has a cameo appearance as a Guest Snare Drum Player on their Debut LP; Pronounced Offee-ick 'Cus, released on Probe Plus Records in 1989.
The band was described by Pete Frame, author of Rock Family Trees, as "The most arresting group in captivity – younger than yesterday, fresher than tomorrow".
[11] This appealed to Geoff Davies the legendary Record Producer of Liverpool's Probe Plus Label, who signed up the band stating they were "Irresistible salad of rootsy pop... Lovely stuff, warm, human, spiritual, compassionate.".
[12] Since the Onset folded in 1995, Simon Cousins has continued to write songs, developing as an acoustic guitarist with an intimate vocal style and poignant lyrics.
He has played concerts throughout the UK including the famous Cavern Club Liverpool (May 2010) and the Members Room, St Helens Town Hall (June 2010).
Tim Peacock from Whisperin' and Hollerin' Online Magazine reviewing Cousins' music stated "There's a mission to both soothe your soul and quietly sweep you off your feet going ahead here, so you'd be foolish not to succumb.
"[1] In April 2010, Si Cousins joined his brother Jon to reform Ophiuchus with fellow members, Pat D'Arcy (Saxophone), Glenn Wardle (Hammer Dulcimer), Pete Causer (Melodeon), Richard Hughes (Piano Accordion), Xavier Tutien (Bass), Myke Vince (Drums), Jack "WestWayy" Cousins (Percussion), Mike Slater (Cruel Driver) and Dick (Mumming Memento Mori).
In an interview with journalist Nick Cook, Cousins commented that "planning rehearsals with band members in Chippenham, Swindon, Bristol, Glastonbury, Liverpool and Paris was a logistical nightmare.".