Kilimanjaro climbing routes varies depending on strength and interests.
Current recommended kilimanjaro routes are Machame, rongai and Lemosho.
Machame and Rongai are cheap kilimanjaro climbing package and takes short time to summit. Summiting Kilimanjaro is the main dream of most tourists, so choice of which route to follow up to the summit is first procedure. Lemosho route needs minimum 7 days how ever it is scenic beauty and has less people trekking through it, so avoid crowd.
Machame route and Rongai route need minimum 6 days and these routes are scenic beauty. Marangu is very famous and has many tourists, it is very easier so people undermine it and sometimes fail to summit.