Keep in mind that leopards suffer from shipping stress and often die during transit or shortly thereafter. When they startle they dart down, which in an airtight bag is like running headfirst into a brick wall. I've had leopards arrive with broken jaws or just plain dead from injury. So best to ensure they are healthy when you get them, and ask the LFS to put an inch of sand in the bag so that they don't kill themselves in your car. With sand in the bag, they will be more comfortable.
The next most important thing in my opinion is to get them comfortable in their landing pad tank, whether this is QT or a tank for acclimation. Best to acclimate them slowly over a few days than drip them and drop them in the tank. My landing pad tank has 2in of sand and medium sized rocks for comfort. This is where I start them on baby brine shrimp to whet their appetites and get them eating ROE (or pods) and then on to TDO pellets. When they get into the DT, they should be used to the DT food.
I skipped the acclimation box with my leopard and put her directly into the sand bed by hand and let her sort herself out when she came out of the sand.
@homer1475 @Slocke would it be better to have an acclimation box with a big tupper of sand for a few days?