Size matters
Performance wise they're fine, like any other L-Arginine supplement. But be warned, they're much larger than the average capsule. (See pic for comparison) No matter how big the gulp of water is in preparation,  they still manage to get caught in my throat, causing panic as I rush to flood it with more water.  What's worse is that the recommended dose is 3 capsules before exercise and another 3 after!  They don't tell you that on the listing.
Rating: 3 stars