I have two Thule 591s (on wingbar edge) on the roof, and a two-bike Saris to clip on the rear when the whole family are cycling.
The Thule is really handy; up and secured in seconds. The locks are mild reassurance for a toilet break, but having seen how quickly they can be compromised by thieves, I’d use an extra chain/cable if leaving for any time.
The Saris is a bit of a faff to put on the car, and the bikes are a bit ‘swingy’ when mounted. Also, there is no security, your rear wiper can’t operate and you can’t open your boot. Other than that, it’s great :D