This is a good choice for your Three-Hunters-Deck! Normally, you can only play 2 restricted attachments per hero, the Three-Hunters-Contract allows for 3 and with this belt, a hero in this setup can hold 4 restricted attachments. I had some really cool combos that way. It is also 0 cost which is great. The only possible downside I can think of would be that it takes a slot in your opening hand when you rather want a crucial attachment, but that should be rare.
I typically find that two copies in a three hunters deck is optimal. — NERD 645