I can understand your hesitation - they aren't cheap and, like all saddles, you only really know if it works for you after committing. Here are my thoughts on your questions:
>>I'm interested to know your times in the saddle:
I'm come from a running background and new to triathlon and last summer was my first "serious" season of cycle training. Because of this, my times were improving steadily during last season on the bike. When I went over to the Adamo my times continued to improve, but probably they would have done anyway. I haven't changed my position since I fitted it, but as I mentioned, I feel confident that I can get a lot more aero now and will work on this over the off season - I am hopeful that this will make quite a difference next season as I'm hoping to be averaging more than 20mph, where aerodynamics are important.
>>Any differences between short-term and long-term comfort. i.e. Is the saddle initially uncomfortable but then becoming more comfortable the longer the session, or vice verse. Or total comfort right through (happy days).
I'd say that it similar to a "normal" saddle in the following senses: it gets a bit less comfortable on a longer session, although a quick "shuffle" normally sorts it out for me. More importantly, I have found it has become more and more comfortable as I have adapted to the different pressure points (in a similar way that your body tends to adapt over a few weeks to riding a normal saddle). The big difference is that, for me, the saddle completely eliminates pressure on your perineum and the blood and nerve supplies that run to your wedding tackle - this can be seriously bad for you. It immediately eliminated any numbness and I felt quite comfortable on four hour rides pretty much straight away - and I was spending a lot of those rides in the aerobars, which would have been too painful for me before.
The other possible variable involved is, does it matter on your build, height and weight for this saddle? Correct me if I'm wrong but it seems this saddle comes in just one size, so is there really such a thing as "One size fits all" in this particularly contentious anatomical territory?
Good question and I honestly don't know the answer - I suspect that it would work for most people, but that is just a suspicion. One comment that many people make is how wide the saddle is and how it can't be comfortable. I think these people haven't fully understood how the saddle is designed to work and maybe they are sitting on it wrongly - that would be understandable as it it a completely different approach to any other saddle I've seen. To understand the shape better imagine the following: Take your regular saddle - now cut off the front 3" (the part that crushes your vitals) - you will have a saddle that is much "wider" at the front - but you sit on it in the same position as before, so it is no wider than a normal saddle. The problem with the saddle you just modified is that it is now too short and is illegal for racing, so you need to tack some "saddle" on the back - but you don't want to sit on this bit, it is just there for the rules. The other point about this design is that your weight is right on the front cantilevers - to make these strong enough, you can see that the designers have had to make them thicker in a vertical dimension, which (again) looks a bit funny unless you realise why it's necessary and that a "taller" saddle in no way impedes your pedalling. You might think that you would feel like you are falling off the front by riding in this position, but I've found that you really don't - in fact, as I mentioned, I feel very planted on my sit bones (which are "designed" to take this kind of abuse.
You have probably notice that there are two versions of the saddle - both are (relatively) heavy, so I went with the "race" version - this doesn't have much padding. The "road" version has more and would probably be more "comfy" - it is also cheaper if you wanted to give it a try. You may get lucky and find one second hand on ebay?
I hope this is helpful and good luck.
Cheers - Paul