+1 to above...

Try it and see how you like it.

I tried one at my YMCA, it was run by someone who knew nothing about cycling.

I would rather just ride outside, or if the weather is truly terrible (ice on roads etc) ride the trainer and/or rollers.

That said, I encourage anyone to try it and see if you like it. But be prepared to ignore the instructor when she/he tells you do hovers, "jogging" etc.

ps the other benefit, perhaps, is a more favorable F:M ratio, if such things matter to you...