We planned our trip for October 2012 with Robert at Go Kenya and had an amazing experience. He was great at tailoring a trip to our timing and budget, and the rates were by far the best we found.
Our guide Tony was great, and did an amazing job of spotting and finding wildlife - we saw the big five within our first two game drives. Went to Amboseli, Nakuru and Maasai Mara. Had a private vehicle, nice lodges, great experience overall.
The only room for improvement was in communication in the month or so leading up to the trip - we wired the deposit, then didn't really hear anything else until the morning our guide picked us up. When we asked questions, we got answers, but they were delayed and not very detailed. We also did a tour in TZ, and our operator was super communicative - she sent us a packing list, and checked in regularly to make sure we had no questions. For a safari virgin, it was a bit nerve wracking to wire money into the void and then not really hear from tour company again. HOWEVER, if anyone else has this experience, I would say not to worry - the trip was absolutely flawless. Robert is a great planner, and Tony was a great guide.