An excellent value lightweight regulator, I am very impressed with how easy it is to use, it almost feels as though you are breathing regular surface air with a mouthpiece in, I am using this Octopus alongside the matching XL4 first and second stage I was originally intending to keep these regulators as my backup set preferring to use my more expensive set but after a couple of dives to test the XL4 regulators I will be keeping my other non Mares set for the backup.