I have to give this saddle a 5 star - not for it's comfort on my gravel bike, but for comfort on my bike mounted on the indoor trainer. Anyone who rides indoors on a (mostly) static trainer knows how saddle comfort really comes into play! After riding a Specialized Body Geometry on my indoor bike for years, I finally decided it was time to invest some time and money into improving the comfort level on the saddle. While the BG was always fine out on the road, it would promote hot spots and saddle sores riding indoors. For frame of reference, I bought a Canyon Grail gravel bike last year and found the X3 on that bike to be very comfortable on rough gravel roads. It's 150mm whereas my BG was 143mm. I noticed gravel saddles tend to be wider and after some research on comfortable saddles for indoor riding, the X3/X5 came up a few times. So I pulled the trigger and got the X5 for the indoor bike, since weight was not an issue. I have to say that after a few weeks of riding 75-90 minute sessions 3-5 days per week, this saddle is way more comfortable and a definite upgrade. The Terra Argo saddles are highly recommended for indoors and out!