Well, let's see. My fleet has two rollators, one lives in the car, one in the house. Both have a seat, basket, handbrakes, four wheels.

One has kind of "flared" handles instead of ordinary tubes with rubber covers. The molded handles with a kind of flare shape allow a broader support for my hands and that is helpful.

Both of mine have 6" wheels and I find them more than adequate for my needs. They move through grass well, snow okay, smaller gravel fairly well, and have handled several muddy or rocky river bottoms.

Both are relatively lightweight but I didn't give weight a lot of consideration because the only lifting I do is to pitch it into the car when I'm finished.

I have used both the straight backrest bar and a bowed one. My preference is the straight one, but it's really a personal choice.

One of them has a removable back bar which is okay, but I tend to leave it on for no particular reason.

I prefer the basket on the front as opposed to under the seat. It's bigger than the under seat kind and much easier to access, especially when sitting on it! But, I did choose the underseat model for my car walker because I never use the basket. On both types, the basket must be removed to fold/close the unit.

To me, the most important thing is stability and I find the 4-wheel model a good bit more stable than the 3-wheel type. Also, the 3-wheel ones I've seen do not offer a place to sit if I get too tired.

I hope this helps B2, let me know if I missed anything.


ETA: I just saw Erin's post and it reminded me that when I first started using mine, I had felt some new fatigue and discomfort issues. My PT re-adjusted it to my correct fit and it made a huge difference for me. Ironically, I did not have it set to the proper height. Thanks, Erin!