Thank you for viewing. Purchased in November 2024, I believe I've roasted about 50 times. It works without any particular problems. [High-Performance Roaster] This is a set of the Sandbox SMART R1 roaster and the official cooler. With the dedicated app, anyone can easily roast authentic coffee. It can roast up to 150g. I think I used it about 50 times a year for a year. While there is a sense of use, I regularly inspect and clean the inside, so it's still usable. The app is free to use, and you can start roasting with your own preferences immediately. With a paid plan of about 500 yen per month, you can also roast using recommended roasting methods for each origin and roasting methods used in competitions. There is no impact on the taste or hygiene issues because the inside of the roaster does not come into contact with the coffee beans.