I use the Bancon A5-S, which Amazon sells for about $250, and like it. My review is on Amazon under the heading, "Surprisingly good Zwift machine for the money". Not a smart bike and I don't have a means of checking the power reading algorithm that Zwift uses. I know it is similar to my previous setup with a wheel-on Elite trainer, so if one is wrong, they both are wrong. If anything, the Bancon is a little tougher - I manually lowered my FTP when I switched.