Overall does what it is advertised to do. Great for snorkeling or freediving in the shallows.

Simple, lightweight and cool looking. Easily attaches to TG-4 in place of front decorative ring. Works great underwater to direct flash onto subject for great looking macro photographs. Looks great on camera all the time with white ring around camera lens but adds about 1/2 inch to camera thickness. Makes TG-4 look more like an underwater camera. Has 2 adjustment settings for light intensity - full and 1/2. Definitely worth purchasing for underwater macro photography as extra thickness not an issue underwater..