In June/July I will be travelling alone from Nairobi to Mombasa with a stop of about 4 days in Voi. I was going to take the train but have read it can take a long time .. so decided to opt for bus. I have tried to find companies on line to see what costs/times will be but have had no luck. Can anyone help - I am intersted in a private company with comfortable and safe buses. Thanks.