I gave it a bit of a test run, and I was impressed, with one downside - you really can't play 4p hanchan on "Free mode", only tonpuusen 4p and 3-player mode (but can't tell if that is a hanchan there).
As for the keys, for those of you not having a Japanese keyboard, you have to remember that to toggle the 12th tile, it's the single quote (') key and to toggle the 13th tile, it's the backslash (\) key.
Quick Note on Sega Net MJ
Moderator: Shirluban
Re: Quick Note on Sega Net MJ
Yea. Despite the limitations on playing with Sega Mahjong for free - the AI is actually smarter than most AI. To win, you actually have to try. Though, agari renchan is not fair.