Jen, I have the Butterfly tri gel and like it. I don't notice it that much on long rides and I assume that's a good thing. I feel like my sit bones are supported and I don't get irritated "down there." Even with the extra gel, I think the saddle is fairly firm and supportive. I will say that I'm a small rider, with fairly narrow hips and seat. And I admit that I don't have many other saddles to compare it to. I swamped it for the Bianchi saddle that came standard with my bike, and I have a Serfas on my hybrid.
On a side note about comfort: The only type of short I own and wear is the Pearl Izumi Ultrasensor short. When the weather turned cooler, I started wearing a pair of PI Sugar knickers that have a slightly different (and, ironically, cheaper), chamois. I have to say that I feel more comfortable after a long ride in the knickers. I think I'm going to try the PI shorts (I think it's the "Quest") that come with the same chamois next summer and see if they are just as comfortable. With the knickers and tri gel saddle, I could ride forever (I'd like to think) in relative comfort.
Kate
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher