UE did a great job when updating the well-received BOOM to version 2. All the magic from the original is there and has been coupled with an app that has matured a lot since the launch of the original BOOM three years ago. The BOOM 2 is excellent at almost anything it does. It is light and has a size that makes it extremely practical while being rugged. The sound quality is more than good enough for both on-the-go use and for listening to radio and music while working around the house. The app allows you to tailor the sound to such an extent that it will work in pretty much any type of environment, be it in-doors or out.
Since it is IPX7 (X is because it is not dust proof) certified, you can use it outside and in wet environments. It will survive submersion, but not much more than that. IPX7 should be more than good enough for handling the occasional heavy shower or drop into a pool, but do not forget to plug up its connectors at the bottom!
Overall, the BOOM 2 is a brilliant little device that is available in a lot of good-looking colors.