For what it's worth, I asked at the lbs. The owner said he couldn't stay on them, and it seems some people can't. His hired mechanic and very strong rider likes them. Says he doesn't get bored like on a trainer. Best shot would be to find someone with rollers and see if you can handle them. If you can, that's probably the way to go. If you can't, remember that in the house, there are lots of things to get tangled up with and injuried by, just in case you take a fall.
Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.