First time on rollers!!! How was your first time!!

[TxDoc]

Rollers are a lot of fun - I like them better than the trainer to ride when it rains or something.
Actually you can coast, yes. You can do pretty much anything you do on the road - as long as you keep a straight line
After a while you get comfortable enough to change the TV channel, grab your waterbottle and drink, answer the cell - or if you are a little crazy like me you can answer email with the blackberry
Have fun with the rollers!!!

Ops, I forgot half of the question - it should not make you more tired, unless you are very tense while riding. A couple of people who tried my rollers said the same thing, that they could only ride like 5 miles and they do 30-40 on the road. But, when I looked at them, they were so concerned with not falling, not moving, etc - that their shoulder were like stiff and they were using a whole lot of effort that was not needed. Try to relax, enjoy the ride like if you were outside - and you will ride longer. Watching TV may help