The good - small, effective, and long lasting lights that can be easily attached. Variety of band sizes will let you use these in a variety of ways. Multiple flash patterns, with good duration.
The bad - charging these is weird and difficult. They're not USB mini/micro/USB-C - - they need to plug directly into your computer USB port or a USB charging dock. They take up a lot of space, so if you're charging these the other USB ports may be covered, and they're finicky (wouldn't work with my USB charging adapters). These are hindrances to otherwise good lights. Oh, beware the packaging 'cause it's difficult to get open.
