I have an old Berina 900 Nova, bought in the late 70s. It's about full size, but much lighter than many other vintage Berinas (like my 730 Record). It has a handle on top of the machine, meant to be easy to carry with you. It's sturdy and I don't find it too heavy to carry in and out of the car (I would rather not carry it several blocks).
Many of the new light weight machines are oddly light, either with suction feet under the base, or they tend to jump about. Most of the portable vintage machines are a bit heavier but more sturdy and easier to become friends with.