Does the job
Slotted in no problems into my Japanese N64, and the memory manager is brilliant. Even if it doesn't have the cheats you want you can add your own, so it's no real bother.

Works Fine
Needs no mods just slot it in (May need a big push) get a game with the same region as your console then your inport game switch on and play. Simple.

Works as described
Has mainly Jap/Us AR codes...if you need more codes google is your friend. Adaptor works as described. Only downside label on cartridge was upside down but was easily fixed.

Works perfectly!...
... Even with a game listed as not suitable!

Passport Plus III Adapter - the best for your PAL N64
I'd buy this for Sin & Punishment, to play it on my PAL N64 and it works perfectly. It has also a good built-in Save Game Manager, you can also save savestates from "cartridge-only" savestates on your Memory Pak. Perfect to play Non-PAL-Games and you can cheat in them ;)