If you choose to stay at a 4-star hotel in Hamburg, you'll typically find plenty of conveniences to ensure you're relaxed, such as a restaurant, gym and pool. You can enjoy top-quality service and upmarket surroundings. Opt for a 5-star hotel and you'll have access to a few extra bells and whistles — think on-site spas, concierge assistance and indulgent turndown services. You're likely to get more amenities and first-rate services at a 5-star retreat, but both are terrific options for luxury travelers.