If you don't want to visit Lesotho on it's own, it's a great way to say you've been to Lesotho. The driver from Durban to Underberg was very professional. In Underberg you join another tour group nonetheless I paid the single supplement for the tour to actually happen. You'll only spend about 1-2 hours in Lesotho and then you'll be on your way back again. All in all, it's a lot of driving.