Wife has one. I’ve never tried a bike inside but yes, they’re not as big as they look. Low roof for vehicle type as others have said.
Decided against roof mounting. I have a V70 and roof mounting works but is an effort in that so would be far too much effort putting them on and taking them off a taller vehicle.
Towbar mounted carrier was the best choice in the end for the XC60. Word of warning. Do not, I repeat, DO NOT, press the tailgate unlock button on the key fob when the rack is on with bikes on. Sure, the tailgate has an obstruction sensor and will close again once said obstruction is detected but it has to make contact first in order to detect obstruction. Oops.