I have tri-focal or multi-focal glasses and I love them!
I really only need them for near vision for reading and when looking at the other side of the instrument panel (diagonal view when scanning) but not for infinity.
I got into tri-focals because in our Globals we have a HUD and it is focused at infinity. Going from the instrument panel to the HUD was a problem with bi-focals and the problem was solved with tri-focals.
FYI... The cheaper you pay for tri-focals the less performance you get in field of view as in width. I paid for really good lenses (expensive ones) and I'm very happy of the result.