Hi, we went there on our honeymoon 5 years ago, and we loved it. We went to a place called Port El Kantoui (spelling ?). The hotel was glorious, the staff was very friendly and the food was grand. We went in winter time, so it was a t-shirt and jeans weather, not shorts, but I believe the weather is gorgeous in the summertime. The hotel we stayed in backed onto the beach, so we would walk along the beach. We only went for a week too, but we did do a tour, organized by the rep, where we went to the sahara desert and rode on camels, totally touristy, but it was lovely and so glad we did it. IT was a 2 day trip and you were up at the crack of dawn on the 2nd day to go see the sun rise, absolutely breathtaking.
5 years ago, Tunisia had their own currency, which couldn't be taken in or out so you exchanged at the airport or at your hotel, and we used dollars which was the best currency to exchange (at the time!).
We went to a few markets and my husband bought a new leather jacket, the trick is to haggle though, they love to barter. Also their dishware is really nice too, don't remember it being very expensive, but not mad cheap.
Enjoy.