On Friday I used my TravelScoot to grocery shop at Walmart. I don't suggest trying this during the holiday rush, but I got a buggy and pulled it from the front using my left hand. I would find a place to leave it near the end of the aisle and zip down the aisle to get whatever I needed. I even bought several 2-liter drinks, but I pulled the buggy down the soft drink aisle for that.
The bathroom wasn't too much of a challenge either. The Walmart I shop at normally has a handicap/family bathroom and that's what I prefer to use, but it was out of order so I went in the regular bathroom. I was able to drive it into the handicap stall, and drive it back out when I was done. I did wait until there was no one in the bathroom in case there were problems, but it wasn't necessary.
If you've ever used a store cart in Walmart, you're going to find that it's a lot easier to open the doors on the frozen food and milk cases from the TravelScoot. I even was able to handle checkout with no problems. My total was about $120, so I had a lot in the buggy. I pulled in line with my cart behind me, then while the person in front of me was checking out I stood up and unloaded my cart. When I was finished I sat back on my scoot and pulled the cart to where it could be loaded, then I stayed on my TravelScoot and went back to pay.
It was easy to pull the cart out of the store to my car and get everything unloaded. I'll definitely use this method again. It's really nice to be able to shop by myself AND to have my own scooter so I don't have to depend on the store having one available. My scoot also goes about 20 times faster than the store one!