The primary advantage of enriched air is to extend the no stop limits beyond the normal no stop limits associated with air. Since enriched air has a lower level of nitrogen than air, you absorb less nitrogen while your body is able to metabolize the extra oxygen.
With more O2 in your mix you will have a lower chance of getting decompression sickness which makes EanX a safer gas to breath underwater.

In simpler word YOU CAN DIVE SAFER AND LONGER, which allows you to explore and observe marine life longer than would be possible when you dive with normal compressed air.
You will also have more time to explore wrecks, take photos, etc.

Since May 2007 Scuba Junction now offers this possibility to all divers, in combination with the FREE use of dive computers (since 1995 !), EanX will again add more enjoyment and safety to your diving experience on Koh Tao.