Hi there,
I have used a pair last winter for my first "real" season ice & mixed climbing. I'll start saying I'm no expert having climbed only a handful of lines up to WI5+ and M7 only (terrible season by the way...). None of my mates have X-Dream axes, so I was able to very roughly compare Cassin's axes with E-Climb's Cryo and Petzl's Nomics. Needless to say, we're talking about three of the high-end axes in the market. It's really hard to say whether one is better than the other. If it were that simple we would all use the same axes
And I've never even climbed on Grivel's, Edelrid's, BD's etc. axes, although I've seen all available models at Friedrichshafen only weeks ago. The high-end range at the moment is ridiculously wide, I can tell you that much...
Now, back to the X-Dreams. With respect to versatility, adjustability and general ergonomics, I think they're really good and possibly have an edge with any other ice axe I've hold in my hands. Triggers can be adjusted or removed and the hand grip can be made larger or smaller. That's all "standard". The change of configuration of the handle is the real deal, which paired with the three picks available makes the X-Dream a true all-rounder. With respect to how they swing and work on ice/rock, they're as good as the two other axes I've tried. It would be like comparing top end rock shoes. Providing the fit is right, and having the patience to adjust to the different models, they're all ace and it's really down to personal preferences. If I were to really look for some "defects" the only thing I've noticed was that the pick (the X-Dreams come with the "mixed" pick, two more picks are available as optionals) seemed to wear out faster than, for instance, the Cryo's (curiosity: Cryo's picks are B-rated, X-Dream's picks are T-rated). Obviously the first thing I've tried as soon as I got them was to rotate the handle. The bolt was tightened to death (factory) and after having changed from mixed to ice and from ice to mixed few times the bolt looked already stripped a little. I guess that's not a massive deal, that's obviously something more to think about, but also the one cool feature that no other axe has (in fact there will be another model from another manufacturer with a similar feature just moved from the handle to the head...). Another thing that is good, but also bad
is the sand paper grip. It's super grippy, but it will trash your gloves in no time. In the end I decided to tape them. Taping the axe shaft is a good idea anyway if you're the type that bites his axes (I am).
I think it's a valid option, by no means a second choice. At least here (NW Italy) they're priced in line with all other top end axes. I guess in the UK they may look like something "exotic". Here they're almost as popular as the Nomics.
Check this out too: which comes from this guy:
http://dziaby.blogspot.it/2013/10/szopa-rozbudowa.html
Hope this helps,
Ciao!
Nic