Here are some pics from my stay at the Krakow Sheraton:
http://www.kodakgallery.com/I.jsp?c=...&x=0&y=-6wnmcr

As a Platinum, I was given a river/Vavel view room-- but I don't think they have an Executive floor or lounge. It is a very short walk to the Old Town, and right next to Vavel Castle. I didn't attempt to go out to the Concentration Camps, as it would be too emotional for me. As for Krakow itself, I found it to be a very easy city to get around, lots of friendly people who spoke english and pretty inexpensive. For myself, I do prefer Warsaw, perhaps because it (unlike Krakow) was so affected by the war. And while most of it was destroyed (Warsaw, I mean), the strength of the people can be seen in the rebuilt city it has become.