In February on this year I was fortunate enough to climb Kilimanjaro via the Rongai route. What a fantastic experience! 10 out of the 11 made it to the summit and the one who didn't make it just had really bad leg cramps on the summit day.
I was so pleased that I didn't get altitude sickness at all (even felt fine on the summit) and I didn't taken any medication apart from anti-malarials for the whole trip.
You can read more about my trip on my website (
http://www.ash.li/news/success-on-kilimanjaro)
I thought I'd best introduce myself on a high as I look forward to getting advice about Aconcagua from this forum.
Thanks
Ash