The SL-7 is a well engineered piece of kit, and if in good working order will give pretty good sound quality.
I remember selling these way back when, and at the time dismissed them, and other Technics decks as "Jap cr*p" against the Linn, Systemdeck, Ariston etc turntables. In hindsight they were actually rather good, and I now use, and throughly enjoy, a Technics SL-1500 Mk1, after 23 years of owning various LP12s!