Strange about the Sonder page, maybe it’s owners only?! So if you do a lot of miles the Cortex is really good, on rougher terrain I found the Rockshox shock a little wooden and harsh, probably down to the tune and factory fitted bands. Moving to the Cane Creek Inline it was much more forgiving with better grip. The Evol feels good with the standard shock, probably as much to do with the tune as the extra 20mm of travel. It has a pretty low seat tube, so you can easily size up if you want, but with my long legs and short body at 5’11” size large was just right for me. The Cortex was a lot of fun and great for powering up small climbs, but as I currently only have one bike I prefer having the extra travel on the Evol. Sonder is a great company to deal with, I’m on my third and likely to get a signal in spring. Bird is also a great company and I wouldn’t hesitate to buy another. Any specific Sonder questions feel free to pm me.