Alright so I have been a firm believer in NO Explode (BSN) and taking good amounts of L-Arginine roughly (4,000mg) a day. After a month of doing this my arms have had a 1-1.5 inch pump size 30 mins into workout..I started taking NOX Edge while still taking my L-Arginine and now at the end of this month 2" pump size. Within a month for a product to increase a pump size and duration, thats something great right there. Not going to say it will replace anything I am taking or have been taking, but NOX Edge is definately something added.