In reply to TobyA: As I said, I have not used the Flys so can't compare. I did not like the swing of the Demon Mountain at all and I am not sure that I would suggest to use it for ice climbing. It felt very heavy to swing but it could of course be that I am too weak. Raveltik's website states that the weight is 670/690 g. I think that my BD Cobras are around 600 g each and I believe that a technical mountaineering axe (which I think the Demon Mountain is categorised as) comes in at around 500 g. Hence my conclusion that it both feels heavy and as a matter of fact is heavy
Having said that the Raveltik products in general feel good and look well built, and they are very reasonably priced.