Basically the bus will take the M18 from the airport to Junction 1 then use A-roads the rest of the way. A time of 45 mins is given, except at peak times when 55 mins is allowed. Just two stops in the Rotherham suburbs. No stop at Rossington or the Wildlife Park.
The fare of £6.30 (with an unlimited tram and bus pass) sounds excellent value given that a taxi from Sheffield is 40 quid and is just 20 mins quicker.
Although the distance is longer, the time still compares favorably with other airport buses. I spent the best part of an hour recently on the bus from Bristol Airport to the city centre.