I've done the survey for you.
That topic is actually close to my heart as I do almost all my shopping on foot with a buggy. At my local store there are trolley lockers that I put my buggy in then use a trolley, then load shopping under buggy (far exceeding the recommended wieght limit which makes it easier but often the lockers are out of order.
Not sure how I'll manage when DS is out of the buggy as no way of getting shopping home...