Hello. We traveled last month to Uganda with Mamaland Safaris and we had an excellent experience with them. Our guide was Godwin, very funny but also very prfessional, and we also had the best driver: Mike. They are great people and very good guides and at the end of the trip we had already 2 new friends in Uganda and still have contact with them.
The advantage of this budget company, appart of the price, is that you travel alone with them (and not with a big group of people), so if you want to change the itinerary, you just need to say it and they prepare everything.
We had a great experience in Uganda and we are sure that mostly was thanks to them that took care of us all the time.