Mambo Italia has become quite popular since it opened last year in Sewickley. Every time I drive by Mambo, it seems packed to the brim. I've only been here twice, but I can say that the pasta is very fresh. Both times, I went with their gnocchi, and it's melt in your mouth goodness. The best gnocchi, I've ever had! Garnished with basil and ricotta cheese, it's prepared to perfection. This is not your typical rubbery, tasteless gnocchi, but a delicate gnocchi with even a potato taste and consistency.
So before this becomes solely an ode to their gnocchi, I will mention that my experiences with the waitstaff has been mixed. In particular an instance with their hostess did not sit very well with me. She was neither welcoming nor very professional. Thus some of the run-ins mentioned by other reviewers do not seem like much of a stretch.
But if you are just going to the food, it is worth it. Just keep in mind you will pay a premium for it ...