Efficiency wise, this Wal-Mart is good. There are multiple exits from the store, depending on where you end up. For example, there's a side exit from the Garden Centre out to the parking lot.
The parking lot is big enough that I didn't have trouble finding parking (although it was a Friday afternoon...). The store itself is larger than the one I usually go to on Donald Cousens, however this store lacked variety in gardening products...there was only one brand of fertilizer and lawn soil when I was there.
Also, the cashier I had didn't give us plastic bags at first. Seeing we bought cleaning products, a rake, and a bag of lawn soil, I at least expected a plastic bag for the cleaning products...