My group had fun with it. The barge chase wasn't as much fun as some in-game creativity when it came to the thieves' headquarters - and in particular, the dynamic between the party and the 'ground-floor crew' that just had to be seen to be believed.
One problem I did have, however, was just how to run that encounter with the twin halflings in the veil-filled room. I mean, no spring attack, they tumble in, attack, and are then blitzed when the whole party thumps them. No challenge. (Tell me what I was doing wrong - it was clear that somebody had a good idea, but I just couldn't get my head around it.)