We have the Thule 9403 (I think - from Halfords anyway) 3-bike carrier for our two ebikes. Positives are that it is solid as a rock, no movement even with enthusiastic driving and easy to mount to the car. Capacity is 45 kg, and with the batteries off and in the boot our bikes weigh in at about 42 the pair, so we are close to the limit, but no issues so far. Built-in light bar and number plate are useful. Downsides are that it can be awkward to mount the bikes. The channels that the wheels go in point downwards away from the centre, so the bikes wants to fall off one way or the other so you really need someone to hold the bike in position while you fix the wheel straps. Also, the positions for the bikes are quite close together, so you have to play a bit of jigsaw puzzling with cranks and handlebars to get the bikes to fit together nicely. I add bungies or small ratchet straps to wheels and bars to keep the bikes still if we are going any distance, and a long cable with padlock around the bikes and towbar if we are going to be leaving them for any length of time. I like the way you can check the bikes in the mirror at any time. With a roof-mounted rack I always wonder if they are still there. I'm happy with the Thule, and it seems very well-made.