I have a pal saturn and both a AR 4M Plus and a Booster Pack 4M Plus. Both do not work well on my system. I got replacements for both, but that didn't make any difference. Below an overview of what does and doesn't work on my system:
AR 4M Plus
Working: Imports, Cheats, 4M RAM
Not Working: Savegames, 1M RAM
Booster Pack 4M Plus
Working: Imports, Cheats, Savegames
Not Working: 1M RAM, 4M RAM
What I mean by 'Not Working' is that those function do not work on a cold saturn. Basically, all of these problems disappear when the saturn gets hot. But who really wants to wait an hour before playing Metal Slug for instance?
And a final remark, the booster pack appears to be nothing more than an older version of the AR 4M Plus. Same interface, different copyright and version number.
It's ofcourse possible that the carts work flawlessly on your system, but I wouldn't count on it. I tried several of these carts on several saturns and have never seen a combination that worked perfectly.
Maybe these carts work better on ntsc systems?
(Edited by Phantom at 1:33 pm on Dec. 13, 2001)