The product is widely praised for its effectiveness in providing warmth, keeping hands cozy, and being a "lifesaver" in cold conditions. Many users report that the warmers provide heat for several hours, with some noting they last for a "good number of hours" or a "decent amount of time." They are frequently used across various outdoor activities and cold environments, including hiking, sporting events, outdoor work, hunting, and skiing. Numerous customers consider the product an "essential" or "must-have" for combating cold hands. Users commonly place the warmers in coat pockets, gloves, or boots for optimal warmth. A significant portion of reviewers express intent to repurchase the product or recommend it to others. The warmers are noted for being easy to activate and convenient due to their single-use, non-rechargeable format, and are observed to heat up quickly. Several reviewers mention the product's effectiveness for keeping children warm during outdoor activities. Beyond hands, the warmers are also commonly used in boots or for other body parts. Many customers indicate frequent and regular use of the warmers, particularly during colder seasons. Some users mention limitations such as their disposable nature, potential for reduced effectiveness in open air, or occasional issues with expiration dates. A few also noted them being almost too hot.