Lens: very good. Fixed zoom but clear, easy to focus, looks and feel quite good for this little price.
Case: smooth rubber, very well made (good finition). The thread is a bit short for a heavy lens so it requires some care (no bumping, and holding the lens too when taking a picture).
Tripod + holder ring: the ring is very good, nice finish. The tripod isn't too bad to start with but you might consider getting a better one later.
Pouch: good for the lens but you won't put anything else inside as it isn't really big (anyway, you don't want the tripod rubbing against the aluminum shell of the lens). The case is definitely too big for the pouch.
Guide: very short but clear. (Only 1 bad point: it is a generic one, so the text speaks about 'our iPhone'. ;) )
Why getting a lens? Not only to have a decent zoom and avoiding using the digital one, but it also helps to get pictures with the focus on a subject plus a blurry background. The results are just astonishing for a smartphone!
For this, you just need a good application, and to easily manage the (auto)focus and do the most of the camera built in your phone, give a try to FV-5 (from Google Play: "Camera FV-5 is a professional camera application for mobile devices, that puts DSLR-like manual controls in your fingertips. Tailored to enthusiast and professional photographers, with this camera application you can capture the best raw photographs so that you can post-process them later and get stunning results. The only limit is your imagination and creativity!")