Juba is a great restaurant! This is the kind of place where if the food is good (which it is) you look past the decor and the dirt - I've eaten here at least 5 times and never gotten sick. There are other restaurants likes this - Da Vang, other ethnic places. Just don't use the bathroom.
We (husband & I) first went here on a restaurant.com coupon. We ordered a few different things and tried to get up to the coupon price, but couldn't because they are so cheap. Their iced tea is amazing - anise stars in the iced tea - I never would have thought that would be good. We loved the Sukhaar - the taste being kind of southwestern (to give you an idea). We ordered chapati with the meal instead of rice (love chapati!) and they took $2 off the bill for each order! On another visit, we had the rice and it was really good. When we go now, one orders chapati and the other rice, and we share - or we get an extra order of chapati, because we love it!
The staff is friendly, helpful when you ask questions. Being open minded helps. Paying at the counter will save you lots of time.