Overall it was a nice tour and I recommend it to people who have a short time in Nairobi. At the Nairobi National Park, you can see lions, rhinos, buffaloes, and giraffes. The four places are close to each other so not much time spent on the road.
We spent a day in Hell's Gate in August and did the full hike including going to the Devil's room. The kids really enjoyed it and also experienced the hot water springs. It is a shame it has been closed after the accident but it is definitely worth a visit.
We had a great safari with our guide Julius, he is really knowledgeable, relaxed and a great storyteller. He went out of his way to accomodate us. The jeep was really comfortable and the safari was well organized overall. You can choose your own accomodation, we went for a budget camp, which was fine. But if you expect a bit more luxury you can go for those options.