I recently got some Serengetis (Claudio model) non polarized drivers gradient. Some of the old CRTs are difficult to see at times- Particularly the cross side MCDU screen. Generally
I've had no problem seeing PFD/NDs. All LED screens are very clear with the glasses (including both MCDUs).

I get the "oil effect" on the windows at times-usually at altitude. The oil effect doesn't seem to happen down low-during TO and landing for example.

Overall I like the tint of the glasses and the drivers gradient a lot. For me it's just the right amount of "shade" from exterior sun, and light enough to make out the interior clearly. Not being able to see the cross side MCDU without lifting my glasses is annoying. And the oil effect is annoying as well but tolerable since it only seems to occur when I'm not looking out the window much. Overall-they're better than anything I've had before, but not perfect.