Pretty decent, with one main issue.

For the low price of free you should definitely give it a try. Pretty immersive visuals, and the details are incredible. I was actually able to walk up to a lantern and study the shape as if I was standing a foot away. Theres also an area with a bunch of flying butterflies that had me standing like an idiot and trying to swat at them.

There is an immersion breaking glitch however that comes about after a couple minutes where your view begins to raise vertically without an input, which makes it difficult to really look at anything as you have to look down and press the trigger to even stay in one spot. Please fix this.

Ryan31394 about VR Island HD for Google Cardboard