We chose the Machame route for the ascent and Mweka route for the descent, because it's a scenic route and good acclimatization. The trek was with Pure Afro. Friends from Slovenia had a good experience with them.
Get your copy of the "Better Safari Photography" e-book at no charge, which pinpoints exactly what you need to know and do before, during and after your safari trip to improve your safari photography results whether you are a novice, intermediate or advanced photographer.