My boyfriend and I recently went on a safari to Lake Manyara, the Serengetti and the Ngorogoro Crater organized by Joshua at Explore East Africa. The trip was very well organized with every transfer, flight, hotel, and meal taken care of. The hotels that we stayed at were idyllic (mainly Serena lodges) and the itinerary was cleverly designed to provide a good combination of game drives and relaxation time in between the driving. Joshua touched base at each portion of our trip (we went to Zanzibar after the safari) to make sure we were enjoying our holiday and that everything was up to our standard.
The best part of the trip was our safari guide, Emmanuel. He had over 20 years of experience as a safari guide and having attended wilderness college, had an impressive amount of knowledge about the animals. His relationships with the other guides also enabled him to share information and find all of the animals we wanted to see over the course of our four day safari. He was also very knowledgeable about Tanzania as a country and about the Masaii, having been born into the tribe himself.
Unfortunately both my boyfriend and I were sick during the holiday (typical travellers' stomach bug), but the lodges we stayed at had doctors on site free of charge so we were well taken care of and only had to sit out a half day of our safari.
I can highly recommend using Explore East Africa for your next holiday. Our trip was perfect!