Bridgestone super "rap"

well, It's definitely Rap but I'm thinking when they made it they thought they were saying super lap?
super rap sounds dumb ><.

Anyway, anyone got experience with these wheels?
I'm thinking of buying some.
They are made of magnesium alloy and are pretty light, although i think regamasters are lighter xD
They look like regular steelies pretty much.

The reason I'm asking is cause I wanna buy them, but I'm seeing some which are pretty much destroyed from cracks stemming from the center of the wheel.

Are they weak or just abused?
I'll probably buy a set if I can anyway but I'm just curious if anyone can tell me xD