I finally recently picked up a set of rollers and they have a mag resistence unit on them. They also came with a support mount to secure the bike that I won't be using. If you have reasonable balance then rollers should be fine. Sold my last set about ten years ago.

I tend to look at rollers as a toning and efficiency tool, trainers on the other hand as torture and punishment devices. Rollers are the feeling of freedom, trainers are bondage. But on the other hand with a trainer you can watch TV and no have to pay attention to where you're rolling.

Wait, sorry, what was the question? Oh yeah, C&V bike on a trainer, no problem. Probably better to use an old steel bike on one than a modern c/f bike. And as noted above, find some air flow from a fan and set up some sort of sweat catcher.