Ibanez UTA20 Tremolo Arm

Just about the only advantage this tremolo arm brings is that it is, indeed, light as a feather. However, I personally disliked how it feels compared to the stock Edge Zero tremolo arm, especially the texture of it. And while I cannot comment on its durability, its really low weight somehow doesn't feel too reassuring.
Now, given that you can buy entire nice tremolo assemblies for not much more, I wouldn't recommend this to anyone but those driven mad by the stock tremolo arms tendency to slip downwards.
I don't think this is in any way a bad product, it's just very pricey for what it is and to me it feels completely awkward to touch.