Ok, I've never had or used a turbo, and in fact never really seen the attraction. When I want to go for a ride, I'd rather do it outside. However.....Mrs Kes has broken her leg and is off the "proper" bike for a few months. She's checked with the physio and got the all-clear to ride a turbo at low resistance just to get things moving again, and to maintain a bit of fitness. Can anyone point me at what to look for? There seems to be a confusing number of models available - does it matter which type, or should I simply get the cheapest one from e-bay?