I was a bit surprised that Lubeck wasn't included as a single site with Wismar and Stralsund - there are a lot of similarities and such a common history. But, regardless, I found it an interesting place to visit.
I note some previous comments about the encroachment of development and reconstruction, however I found the individual buildings to be quite impressive when viewed in isolation. There is a good breadth of architectural styles and periods represented by the main buildings on the island.
It certainly, however, feels like a relatively modern city with a few patches of history still within it - and that gives it a slightly different feel to the aforementioned cities, which I felt still had more of a traditional Hanseatic feel to the old centres.
Incidentally, Lubeck is actually quite a nice place to spend a night or two and relax and I enjoyed wandering around and spending some time by the river.