I have two friends that returned from this cruise/tour two weeks ago. They are experienced travelers, and said it was an absolutely wonderful trip. "1st class in every respect, clean, good food, great accommodations, and a wonderful ship for the cruise portion."
Of course it will be warm/hot in August... (Have you ever been in New York on a hot summer day?) - - Summer is a time for light clothing, cold beer, and a shady spot on deck to watch the world drift by...