I don't see any reason not to get it if you can make or afford one. Someone might try to say "well if it's a higher rank it'll decay faster", which I still think is a load of ****. I've been using mine since around Marauder rank 12 and now I'm Marauder 16. I wear it for everything except for crafting (normally anyway), have died numerous times over to things I had no business fighting, slain countless other poor bastards unfortunate enough to get in my way, and it's still hovering around 80% durability.
The only real drawback is you'll look like 95% of the other DoWers, but since gear is so limited at the moment you're going to look like everyone else no matter what you wear.
Naiya | Mithra | Windurst | Rank 10 | 1st Lieutenant | Ragnarok
WAR: 75 MNK: 75 SAM: 66
RotZ: O | CoP: O | ToAU: O | Apoch Nigh: O
Naiyah | B.Elf | 85 Rogue | Stormscale
Doubleday | B.Elf | 85 Paladin | Stormscale