Adjustable weight benches should have capacity to clearly handle more than your biggest lifts in order to make you relaxed doing them. They should be solid and super-stable.
Benches should be adjustable to the user's needs and shape. They should be designed for efficiency and comfort - for instance, they shouldn't have legs that get in the way of your own. You want freedom to put your legs (and maybe dumbbells) where you want; Many benches have annoying leg positions because it's cheap to build in stability that way. Benches should have a wide variety of inclines and declines to permit muscle attack at different angles.
These benches offer well-designed add-on options can hugely improve your training productivity, adding major compound and isolation exercises in a way that lets you perform them with minimal extra space. And they have a super reputation in the biggest markets.