My spouse and I went for a 6-day safari and we enjoyed every moment of it. We stayed in Tortillis camps: one night in Tarangire, three in Serengeti, one in Ngorongoro. Communication with the Easy Travel representative, Voice, was prompt before and after we booked. All our questions were answered in great detail within 24 hours. All our requests, such as itinerary adjustments, were fulfilled. We had a last minute flight cancellation from Amsterdam to JRO and Voice arranged an additional night in Arusha for us.
Our safari vehicle was a big 4x4 land cruiser which can seat 7 people, so we had plenty of space for us two. It had a pop-up roof, a fridge with free water and soft drinks, two binoculars, and an outlet. We never had any issues with the car and I think it's well maintained. I had a change to see a glimpse of the main office where these car are stored and maintained. It looked very professional with a dozen of maintenance bays. I saw a couple of dozens of safari cars in their parking lot and it appears that the company has many dozens of vehicles (we were told close to one hundred) and is truly a big safari operator. While we were on safari, the car was cleaned daily.
Our driver/guide, Santiely, is an expert driver with 20+ years of experience. It was the beginning of a raining season, which means lush vegetation, but also mud. Lots of it. Many drivers are simply avoiding muddy side roads and stay on the main roads which are better maintained. But you have to go further away from main roads to see big cats. While we observed other drivers getting stuck in the smallest puddles, Santiely braved long, hundred meter long stretches of deep mud where the car was skidding non-stop. If you are coming during the rainy season, keep in mind that a good driver means not only that you see more, but also that you are not stuck in mud overnight.
Santiely also has a vast knowledge of local flora and fauna. We learnt a lot of interesting and fun facts from him. He has an incredible eyesight and can spot wildlife from far away. He made sure we saw as many animals and birds as possible, including the big five.