If it applies the invisibility effect, the annoying little swirls will make you "Visible" to anyone within 16 blocks. Hide ALL potion effects while wearing, and as an added bonus, add basic tools that are invisible, like picks, swords, maybe bows, to allow you to be fully invisible. (Tools should only function like stone or iron, the price you pay for invisibility). And if possible hide capes too (Duh).
(Sorry for rant, I just wanted my ideas out there)