Thule T2. Versatile enough to carry everything from 29ers to kids’ bikes to cruisers to rigs with fenders. It comes as a 2 bike mount but the 2 bike extension can be added for the big family vacation then removed when you get home and just have yours. It’s really massive with 4 bikes. It’s also nice because all the pieces can be replaced if damaged, not that I’ve ever backed into the edge of the garage or anything like that. But the Yakima Hold-up is all welded together so if you bend a tray the whole rack is compromised. The Kuat KV is nice but not THAT nice to warrant the extra bread, unless you want a status symbol. I’ve heard great things about the One-Up but have never scrutinized one.