Anything I should be worried about concerning this JDM reel? I love the chrome finish, is it a good reel or does it have known problems? I can find some very good looking used Japanese ones.

Sweet reel have been using it for going on 5 years with no issues.  Yes you will hear chatter about the famed "Metanium Hum" it drives some to the point they jump out of their boat and into the water. The good news is you can buy a brass gear set from Tackle Trap if this fateful issue ever occurs with yours  and you will be saved. Seriously the only other thing is the worm gear rides on a bushing but that is an easy fix , replace it with a Shimano knob bearing and you will be good to go. Almost forgot have the brass gear set but it still sits in the package.

If the worm thing bothers you, the abec rated bearings from smooth drag have worked great for me. They are pretty pricey, but very worth it for smooth quiet operation. I prefer these for this location because, I can’t say why, they just require less maintenance. I hate popping the C clip on and off the worms of my reels.