Yes, you absolutely should make a reservation if you want to build a custom lightsaber at Savi’s Workshop – Handbuilt Lightsabers in Star Wars: Galaxy’s Edge. This experience is extremely popular and has a very limited capacity, as only 14 "builders" are allowed in the room at a time to maintain the immersive, theatrical atmosphere. Reservations can be made up to 60 days in advance via the Disneyland app or website, and they usually require a credit card guarantee; if you miss your appointment without canceling at least 24 hours in advance, you will be charged the full price of the experience (currently around $250). While "walk-in" appointments are technically possible if there is a last-minute cancellation, they are incredibly rare, especially on weekends or during holiday periods. The reservation is for the builder only, though you are allowed to bring one "guest" to watch the process. Because of the high cost and the intense demand, securing your spot as soon as your booking window opens is the only way to guarantee you can fulfill your "Jedi" destiny and walk away with a high-quality, personalized hilt and kyber crystal.