No elevators. Call the resort a couple of weeks ahead and request a ground floor unit, close to the pool. They will try to accommodate you, based on our experience.
We have exchanged there at least 5 times, they are a large resort and have lots available for exchanges. We really like the resort, it is nicely set up and they maintain it very well. The wifi works well (there was a charge the last time we stayed there.)
A couple of things. They charge for A/C, we didn't know that the first time and were not pleased it was not listed on the II website. But the AC works great. Depending which unit they receive, they will have a washer/dryer in the room, which is so convenient. They also have a pay laundry on site and there is a little grocery only a 5 minute walk that has fresh baguettes daily. (YUM).
They only give one beach towel pp, so we pack a couple in our luggage.
The resort is away from other areas, (you need a car) and close to the French side. At night the roads can be scary as there are a few places where there is a ditch immediately to the right side of the pavement so you must drive carefully.
fyi--We use Kenny's car rentals, Mr Bruce meets you at the Airport and you bring the car back there--no need to go off site as most of the car rental companies. His prices are reasonable and he won't play games and accuse you of denting the car (we had that problem prior to finding him). You can probably google/find a few other local rental companies that others recommend.
Hope they enjoy their trip.