Drivers from the airport know the Courtyard Arcadia in Pretoria. You can get a driver (a little different than a taxi) if you come in too late for the train (about a 30 minute drive), or take the convenient train from the airport to the Hatfield Station (end of line) in Pretoria, then a 5 minute taxi ride.
Hotel staff are very nice and helpful. The rooms are large and comfy. It has the feel of an older hotel, with the cleanliness of new. We stayed two nights, went on Safari then came back for two more before flying off to Victoria Falls. BOTH experiences were excellent.
OH - and their breakfast is a full serve, how do you want your eggs cooked breakfast! You have to pay for it, but well worth it.