I switched to this saddle from the Specialized Mirror. Both saddles are short-nose saddles and have the over all same dimensions but the selle italia has a bigger cut out and the 'wings' transition further back. The Mirror is 'softer' and has a bit more give but the wings created issues as they transition further forward and made that saddle not as comfortable. The Selle italia is a bit more firm compared to other the Mirror which feels a bit more springy but I personally prefer the feel of the Selle Italia.
I also think that there is 10mm extra range of adjustment compared to the Mirror which is nice when it comes to the bike fit.
They set up tubeless without much fuss on a wheelset with 19mm internal width. I have had two punctures in the past two months, but both punctures sealed with sealant while I was riding and I didn't even notice them until I got home. I ordered these tires in 35mm, and they blew up to 34mm on my rims. I have another set of wheels with 24mm internal width with some 32mm tires, and they measure the same 34mm width. This is a good width for me, as it allows me to run low pressure (~50psi) which isolates a lot of road roughness and also allows the tubeless system to work better.
I'm using Reserve Fillmore valves so I wasn't able to inject this stuff but I still used a sealant injector to get it into the tire without making a mess and it did not clog. I've already had a small puncture that sealed but it did take a while, it was close to the sidewall and I probably didn't have enough sealant in the tire to be honest. I didn't look at the recommended amount for the size tires I'm using so I should have added 15-20ml more. Assuming this stuff lasts at least a few months and the fiber foam stays suspended in the sealant rather than gathering along the tire bead making it less effective then I will buy it again. It is expensive but so far so good and it is a vast improvement over the original stuff as far as usability goes.
I've done a lot of multi-day long distance cycling and years ago settled on the Aliante as the most comfortable saddle for me. After prostate surgery I was advised that an open saddle would be preferable so when I started riding again it was on a Fizik Tempo Aliante R3 saddle. At first it seemed too firm and the edges along the open center seemed to dig in a bit, but after optimizing the position, it's become even more comfortable than my previous Aliante. I couldn't be more satisfied.
