xtp are immense, i had mine for well over a year before it cracked and i improved loads on it, if your a real heavy rider then it isn't the frame for you but if your fairly smooth and uci then there a good frame. BUT there not worth the £550 asking price, if i were you and you wanted somthig similar then get the echo lite, the steeper head angle and higher bb make it more flickable and bouncy, and for £220 you cant go wrong.