You can disenchant all of it, but none of the enchantment effects are useable, so it's pointless to disenchant it.
It's good for looking good (if you like the look, that is). It has kind of weak enchantments: Stamina, Sneak, Archery, One Handed, all at 15%. They are useful, but aren't too powerful.
Thieves Guild / Guild Master has a different set of enchantments entirely: Carry Capacity, Pickpocket, Lockpicking, Barter. I don't really find those enchantments useful.
Shrouded Armor comes with Poison Resist, Muffle, Archery, and the 2x Backstab. I think this is much more useful, the Ancient version has high enchantment numbers too, like 100% Poison Resist and 35% Archery.
Nightingale armor gets Stamina/Frost Resist, Muffle, Lockpicking/One Handed, Illusion. These are pretty useful too, and if you get them at level 32+ they will have high enchantment numbers.
It all comes down to what kind of character you are playing. Some of the sets are better or worse than others, but certain characters may like something that other characters wouldn't.