The title, I would change to "Deciding where to buy things" which means "Where to do shopping."
First of all,we can quickly and conveniently buy grocery and other products at
supermarket. Many people like the ones with
a spacious, large one, with wide corridors. There the largest super or hypermarkets, the chain stores, the ones usually more expansive than others - [*]Hiperbompreço, Pão de Açucar, Carrefour.
It is also good to enjoy a walk in their interior, especially when they have a sizable interior, with wide aisles, where people don´t have to squeeze to navigate.
It´s also desirable, I would say, essential that it has fast-food places or restaurants to eat after shopping. What’s more, the car park
[**] be well-organized, large enough[***], with car-boot security checks and all that for free (at least for a certain ammount of time).
On the other hand, you/one may prefer your/a local butcher shop that will offer special treatment, poultry and groceries.
Those, that you always can rely on to offer expert advice and cooking tips. Furthermore, you can buy without
long and stressful queues[****], and on many occasions you do not have time enough to waste on the checkout counter of a big supermarket!
Although shopping is a private choice, my view is that everyone should search carefully before buying
things and choose the best place to find all you need. Thus, there is no good and bad local to buy things; it depends
on preferences and time available.
[*]it could be left out, but I added them, just for explanation´s sake.
[**]OR the car parking area.
[***]with enough parking espace/with a good-sized car park etc.
[****]I am comparing with bigger supermarkets; anyway, if you may think of a butcher shop in a hypermarket in wich there is just one queue/line, so your sentence here would be:
"you can buy without taking a
long and stressful queue"
Even though, technically you don´t buy taking any line or queue, wether stressfull or not.
So, would be more to the point if we changed that bit to:
Furthermore, you can buy without being worried about taking
long and stressful queues[****] at the checkout point, and on many occasions you do not have time enough to waste on the checkout counter of a big supermarket!
-Grammar point: be careful with verbs after prepositions. After prepositions we usually use the gerund form.
I´m sorry I tinkered too much with your text!