Having a good friend in a wheelchair have seen some of the issues that they encounter. I have also seen a kitchen that was design for wheelchairs and the one thing that is often overlooked is leg room. In this kitchen, their were no cabinets under most of the counter. I suggest making sure that the bar extends far enough out to allow a wheelchair to pull up to it completely, or have a cut-out under the bar that would allow the same. Simply put, make sure the person can comfortably rest their arms on the bar while also extending their legs a little. I would also make sure that they are not sitting in front of a wall. You might also want to think about bringing the whole bar down to the same level. It would be great to be able to pull up a wheelchair, but everyone else at the bare would be above them, kind of tough to carry out a conversation. Hope this helps.