In reply to Ivan Braun DK:
Hi Ivan.
Having been on Aco a lot in the last few years can say that the beast is usually under-estimated.. It has a very low sucess rate due to its high winds cold temps etc.. build a realistic time on the mtn into your planning.. don't rush the peak .. get acclimitised well and give yourself at least 3 days to sit in either of the high camps and wait untill you have the optimal conditions!
I will be on the mtn from beginning December this year and my Business partner Raj Joshi will be leading a second 360 trip there early jan 2012. Come and look us up we'll be there to help you with anything you might need for your ascent! same goes for any pre-exped planning..get in touch.