I have just done 1 hour and 20 minutes on mine there, it does get a bit boring but I am just thinking about the weight that I am shifting, and defo get a mat under it if you use them indoors because the sweat....loads of it everywhere LOL.
On a side note, I have read about how you have to make sure that your bike is completely level on the rollers or that you could hurt your back, now to make sure your bike is level from wheel axle to wheel axle would require either the back or the front of the roller to be raised I would imagine, so should there be adjustable feet?
Also, emotion rollers, has anyone tried them or own them? They look the business for getting out of the saddle as well as allowing forward motion, I enquired about these but was quoted $942 delivered but I take it there would be customs tax on this as they would be coming from the USA, just too much sadly.