I had the chance to ride the Rail 29 a couple of times this past weekend out in Sedona for the festival. I was strongly encouraged by my local shop to get some miles on it, so it was the first bike I took out once the demos opened up. I'm currently on a Yeti 5.5 with the Float X and a Fox 36 with the Grip 2 damper. I am an XL rider, and am about 235 rider weight. When I hopped on the Rail for the first time - also my first time on a Revel or CBF, it was pretty subdued. In pedaling down the road to the trail head, there was no pedal bob at all. Just kinda low key. The demo was spec'd with a Debonair Ultimate and a Zeb Ultimate. Again first time riding these two. We took the path up Teacup and down Grand Central, to Adobe Jack. When it started to go uphill, the bike was really confident, and reminded me of my Yeti, but climbed better and the rear end came alive to a degree. Going down hill, the bike was more lively, but again, the term that came to mind was "competent" To me the bike felt like it was saying "I got this". The Yeti and the Fox fork loves to go over the chunky stuff, and it doesn't do the best job of smoothing out the small bump stuff, but does gobble up the bigger hits. The Zeb was way more plush off the top, and was like a magic carpet over the chunk. I tried to hit as many bonus lines as I possibly could to see if I could get myself out of my comfort zone, and I didn't succeed on the Rail. It seemed like a very confident, but a quiet bike in its temperament. It doesn't feel super fast or snappy as far as pedaling goes, but it is FAST.
To contrast it with the other 2 bikes I rode during the festival - the Specialized Stumpjumper EVO, and my Yeti 5.5 - I was really shocked at how confident the Rail was on the climbs. For being a bigger bike, it climbs REALLY well. Better than the Evo and better than my 5.5. The Evo struggled with the back end over chunky climbs. I felt like I was dragging the back end up with me at times. Descending on the Evo is typical FSR - it does ok. Its not great, its not bad, its just there. The 36 on the demo bike didn't have the same spacer set up like mine, so it was a bit more harsh, but that's to be expected. If I didn't know any better, and if I was only going by specs, the Evo is a good bike, but its so many compromises overall. My Yeti is feeling a bit out dated when it comes to climbs, and that's my biggest goal with getting a new ride - to get more modern geometry, and to let me climb a bit better. It still descends like a lunatic, but it doesn't feel as refined and controlled as the Rail did. I always feel like the Yeti can go faster than I am comfortable with, downhill, and that's totally fine.