I heard the cabins may be smallish. I am having a hard time visualizing the HAL specs of 155 sq feet. Last cruise we were on Celebrity Galaxy. The Galaxy had a cabin of 177 sq feet, which was adequate seeing we did not spend too much time in cabin. This will only be our 3rd cruise, so we are still novices. Is it true HAL has no tipping policy? Also do we need an escort in Istanbul?