Vidanta actually provides transportation from the airport; you should be able to find instructions on your confirmation to sign up. You’ll have to pay for the taxi back when you leave (~180 pesos).
There are a number of posts on how to get off the resort on foot; short story is to walk north on beach to the Sea Garden, then go through its lobby and catch a bus to get to PV or wherever. There is a farmers and craft market near there Saturdays and another at the other side of the Marina on Tuesdays. There’s another one in the PV Marina on Thursday nights, too.
Vidanta has an app for the resort that is worth downloading. It includes a map that uses your phone’s gps, too.
The sales presentation has quite the reputation. Only go if you have an interest in buying and are willing to give up a day.
Read through the threads on Grand Luxxe here for more info. We like the Havana Moon, Epazote, and Costa Azure restaurants on the resort; Eddies in the marina area off the resort, though we had a lot of recommendations for Titi’s and Sonora al Sud; and El Patron in PV.
Vallarta Eats food tours are good, but you’ll need to book yourself over the internet rather than through the resort’s tour agents. The tequila tour on the resort is also worth doing.
As you’re staying in Grand Luxxe, you can use the hydrotherapy portion of the spa free for an hour per day, but will need to book it; your concierge can do this.
There is coffee service from 7:00 to 10:30 daily near where you’re concierge sits. We always buy our own milk instead of using the artificial creamer they provide; personal preference. We also drink the tap water with no issues, though they stock the rooms with bottled water for sale.
Note the names of service people that treat you right so you can acknowledge them in your check out survey and/or on trip advisor; it makes a big difference to them. Also, you have to ask for envelopes to tip the maids in Vallarta; they automatically provide them in Riviera Maya. Treat them right; there are a number of very lowly paid single mothers working there.
Enjoy your stay! We always do.