I arranged 2 activities: a private overnight tour in the Lake Navashia area and a Nairobi National Park 1/2 safari with Perfect Wilderness. I was very nervous working with a company over the internet, but the staff were extremely responsive and helpful, making adjustments to itinerary, hotel, and inclusions (food). I paid in advance through an online system, which was seamless.
For the 2 day tour, we were picked up at our hotel by driver/guide Jimmy. Jimmy was amazing! Throughout the 2 days he made everything happen that we were planning to do, got us the best guides/boat operators, and made sure we were happy and safe. He even showed up with a full pallet of water on the second day, when we weren't sure where we would get water. His experience as a safari guide was helpful, especially during our Crater Lake tour where he provided interesting information on the animals, and his driving skills are top notch - we couldn't believe how well he navigated the Toyota Voxy over rough terrain.
For the Nairobi National Park tour, we were also picked up early (6am) at our hotel, but had a different driver. The pop-top safari vehicle was quite old, and probably needed some work as we could smell fumes when the top was down. The seatbelts also didn't work well, and overall the vehicle was pretty worn. Although our driver was excellent at navigating over the rough roads, and made sure we saw the lions and rhinos (the drivers are on the radio constantly, talking to each other about sightings), he didn't offer too much in the way of information about the park or wildlife. In fact (nothing to do with Perfect Wilderness), we saw very few animals during our 3.5 hr excursion. As we left, it seemed the animals were just waking up, and I wished we had done a tour a bit later in the day. Also, I thought there were just too many vehicles clustered around the lions and that the park should do a better job with enforcing viewing guidelines.
Overall, we had a positive experience on all three days and I can definitely recommend Perfect Wilderness. Everything was exactly as promised.