andrea, i'll definitely post a review..
it's a short cruise- only 4 nights, but we scored a killer deal. $310 a person! so we are flying into barcelona and staying 2 nights and that's where we pick up the boat. then we go to marseille and aix en provence france, then to ibiza (dance party anyone??) and back to barcelona. then we're spending another 2 days in barca.
we were on a 7 day cruise 2 years ago and i had a great time but i personally felt like 7 days was too long for a cruise. i know some people love it, but i get antsy. so this is really the best of both worlds for me.. time at land, time at sea, and super cheap!!