Have never had much interest in using indoor cycling trainers. However, after a knee op I did briefly look at the ‘smart turbo trainers’ linked to interactive apps, but they appeared to be aimed very much at the roadies. Lately, there appears to be a few interactive turbo trainer apps catering for offroad interest. An interactive setup is somewhat too expensive at about £2000, but I am still interested in comments from anyone who has used the interactive offroad version.