I would definately go back to Tunisia but to Sousse next time. Nothing wrong with Port El Kantoui. The only thing was in my opinion it was like any other holiday resort. I just found Sousse more real and personaly prefered it. But then, some people hate Sousse (don t know why)
PEK is great for a first voyage to Tunisia! I would definately stay at the Kanta again though I d love it if the Kanta or Marhaba palace were in Sousse. But I d probably have to take a gamble on hotels when I go back there.
But in any case Sousse is only 20 minutes away by Tuk tuk from PEK. So you get the best of both worlds there really!