You're going to love it. They put something in the rubber for 29" tires that's like crack. Once you try it once, you're hooked and its all you think about!
And SS? I also love it. You may have a tougher time at first until you build your legs up, but once you know your trouble spots, there's no better feeling than standing up and mashing for that climb you know is around the corner, and your legs are burning at the top of the climb.
Its hard to explain, its just you and your legs against the world. Make it and you feel like God. Don't make it and know what you need to work on.