Some interesting points made here by everyone and definately something to consider.
It does seem like cost is the biggest downfall and therefore value for money.
I must admit, at first I didnt think much about the actual cost of it because, coming from a mountain biking background, I didnt think much of the £600 price tag as I have paid that for a second hand frame before now lol.
But reading peoples comments I can see that better value can be had with a modded mk2 Flexi.
Cheers everyone.