I've stayed at all four....Singita Boulders, Lebombo, Sweni and Royal Malewane. Sweni is very small, only six suites. Its main benefit is that it is right on the river and the views are wonderful. Lebombo sits higher up and is the larger and more social of the two. These two properties are ultra contemprary, almost like being in a Soho loft in the trees. As for Boulders it is simply exquisite in every way. Royal Malewane comes very very very close. Both have great food, service. For game viewing Lebombo and Sweni are in an area that has not had tourism for as many years so the animals are less used to jeeps and humans. Truth is you can't go wrong at any of these camps.