I got some valuable advice from the Africa forum, however thought of asking a couple of specific questions here, in anticipation of larger audience.

I Need to purchase a multi city ticket
ATL - EBB Feb second week
EBB - ADD April second week
ADD - ATL April Third week

I am getting cheapest fare of around US$1590 from Ethiopian airlines

Any other airline or combination is more expensive then ethiopian.

The Ethiopian air routing is going to be as follows:

ATL - IAD UA6094 (5:45 am US time)
IAD - ADD ET501 (10:30am US time)
ADD - EBB ET811 (10:55am Ethipian time)

Next:
EBB - ADD ET810 (5:25pm)

Return:
ADD - IAD ET500 (10:15pm)
IAD - ATL UA3769

Is Ethiopian the best bet regarding this trip?
How is the customer service experience from Uganda or Ethiopia in case I need to change the dates for the return leg (ADD - ATL)?

Thank you all in advance