Do you know how to use a true bar to check the bottom flatness? If so, take it to the shop and check them before you pay. If they aren't true everywhere on the bottoms, persuade the shop to give them a full tune before you pay.
If the bottoms are true-flat, you can do the edges yourself, can't you? If not, look very closely at the edges and be sure they are sharp enough to get some scrapings off your thumbnail. If not, persuade the shop to run the skis through their edging machine.
Or, just get the full tune with the edge angles set to your style of skiing and your expected snow conditions with hot wax to suit. This will guarantee the best skiing performance for you on your first days out. Some ski factories put the skis out in excellent condition. Some put out skis that are very variable. Some new skis cup due to continued curing of the epoxy. Don't count on new skis skiing their best without work.