I went for the 4 bike Mottez, because it was cheapest at the time.
Fitted on the back of a VW Touran, nose weight of 75kg
Rack weighs 25kg so 50kg split over 4 bikes is ok (did have to buy the wife a new bike though!).
The tow bar is a removable one and so I’ve clamped the rack onto it and just slot it in when I want to use it, as I wouldn’t use it without the U-bolt attached and that’s what takes the time to fit (the car has no other towing duties).
It is very heavy and awkward though.
The wheel troughs aren’t made for tyres larger than 2 inch so one of mine has split from fat tyres (2.5 max) being wedged in over time.
The nylon straps are very good BUT will rub and mark paint on frames and wheel rims, so cloths and helicopter tape are your friend.
When you have fitted 4 bikes on and everything fits nicely, take a photo of it for future reference!
It tilts if you need it to, but we have good access to the boot through the rear seats so I’ve never needed it.
I have a friend who has a thule (3 bike, not sure what model) and I think it’s very good but wasn’t worth twice the money that I paid for mine.
Hope it helps.