I am an occasional rollator user and my partner is an occasional wheelchair user! (Different needs.)

If you’re driving, kind of sucks. Unless you have a more spendy, lighter wheelchair, the wheelchair is a bit heavy to get in and out of vehicle. (I have hurt my back dealing with my partner’s chair, but I am short.) The rollator is still a bit bulky, but they also fold like a wheelchair but are also smaller and lighter.

I haven’t used public transportation with these types of mobility aids. But I have seen wheelchair users get strapped in separately. You would need to hold your rollator in front of you.

I haven’t had trouble in a restaurant with either one. With a rollator, I put it between me and the (vacant) chair next to me. Never tried a booth because I wasn’t sure where to put the rollator.

If you’re going to a place where you would use a cart (like shopping), you need to handle the rollator somehow. I usually leave it in my car, but I’m not sure how you’d handle this if you took public transportation.