5 star hotel? I am not sure the grand appeal here but nice property, many things to do (bowling,…read moredisco, kid zone, pool, billiards), okay location, small but appointed rooms and prices on food are reasonable. What is not reasonable is the upcharge on a weekend night. Double the money and nothing new or exciting except a "disco", or club, at night. That is the same place the bowling is at (think large skee ball). The servers down there are so full of themselves it was sad, but entertaining, to watch.
Still a fancy place with fancy things but nothing to really say this is the place to be in Ustka. Try a B&B closer to downtown, like pokoje goscinne pod delfinkami, and you will get a better feel for this lovely city.