We were pleasingly surprised by the quality of Xaa Safari agency and the dedication of the staff. Xaa Safari is a small local agency, with very competitive prices.
We stayed in the middle of nowhere in Central Kalahari Game Reserve, with no-one around us for kilometers.
The infrastructure they set up for us was amazing: sufficiently large tent with beds and mattress, chemical toilet and shower.
We had an (excellent!) cook, two guides and a one other staff member.
The food was excellent, every day.
The game drives were disappointing as we didn't see any of the big 5, we were just very unlucky. But that is a safari: there are no guarantees.
But sitting around the fire at night, and gazing at the sky with millions of stars (as there is absolutely no light pollution), is worth the trip.