Awesome piece for thf haste build the availability of this at lvl 50 is a major plus as well. This paired with Bravo's Subligar is an awesome combo both haste wise as well as ranged acc.
Cloake, perfect advice as to how to obtain the gemini subligar. I just used the same setup (NIN/DNC, THF/NIN) and got drop in a little less than an hour. I urge anybody who can find a NIN/DNC friend along with your THF/NIN and get this drop to get this. It's well worth the time you'll put in.
I agree with Kaioshin, get this for THF at 50 and stack it with Bravo and Swift and you have +4 r.acc and +11% haste. Only other job that can get that haste at 50 is MNK with Brown Belt and the 3% boots.