In reply to Geras:
There is more recent info in the logbooks on here.
I did the original start route in 1978, so can't give you any updates. After the initial buttress, which was not easy to navigate in the dark, a lot of folk bypassed on the left then, most of the rest is 35 degree snow or ice. How steep or hard the seracs at the top are can be critical. I found an easy angled ramp but the blue ice was rock hard and dinner plating.
If you get good weather and reasonable conditions you should be OK but how are you at altitude ? Can you maintain a good pace for 1300 metres with a paper bag over your head