I've tried 6 saddles since January and think I finally found the one for me! I went with the S/M with a sitbone width of 11.8 and think that was the right move. I experienced no discomfort on two 80 mile rides when I usually started fidgeting on the saddle after the 30 mile mark hunting for comfort.
The foam core soaks up a lot of chatter on top of contributing to comfort over long distances. My only hesitation with it is how long it will survive with weather and wear.
This was a replacment for my previous Prologo Scratch M5 Pas. The previous had the carbon Nack rails, which unfortunately did not survive a crash. I decided to save $100-150 at the cost of the of about 50g and get the Tirox rail version (supposedly more durable too). For me, this saddle pretty much disappears under me, never even think about it. The Nack version is noticably stiffer (which I kind of miss), but if more plush ride is important than definitely get the Tirox version.
i have used SLR saddles for 15 years on every bike, but my favorite version was discontinued years ago and is now almost impossible to find even used. cutout saddles have always bothered me due to being able to feel the edges of the cutout. this saddle is the perfect shape, and while i can still tell there is a hole, it hasn't been a bother yet after a couple of test rides. I also appreciate the thicker padding now that i am older and the majority of my rides are mixed terrain. The price is higher than i'd prefer, so i'm not going to jump at putting one of these on all my bikes yet, but so far i am happy with the purchase.
Overall, this is a well made saddle with a pretty substantial padding layer. I came across this saddle based on my criteria of a 135ish width without a hole to use on a gravel bike. The padding comfort is top notch and the width was perfect for me, but unfortunately the edges are pretty square and on long rides I noticed pain on my inner thighs. I have found this saddle to be perfect for a cx race with the thicker padding and shorter ride time, though.