I forgot to post this when I checked out Mari a few days ago.
You've probably already read about her, so I'll add only the points that I feel will help you decide on her.
1) She is culturally, ethnically, and lingually Japanese. Legit Japanese, from Japan.
2) Her torso and legs are long, long, long, and she carries her thin body well. She is realistically around 30-35, and definitely not in her 20's as others have reported.
3) She doesn't like nipple play, seems to enjoy DATY / DATO (shockingly), and isn't as tight as many of the other girls at MF. Also, she overacts with the "kimochi ii" and "ikisoo, ikisoo" and whatnot.
4) She is a rusher. I attempted to make things click by speaking Japanese with her, but she just used that knowledge to ask me to cum faster. So there's that.
5) Cute girl, with an upbeat attitude and personality, but I would not repeat. Even the novelty of her being Japanese (first one in an AMP for me) wasn't worth it. She means well, but she just doesn't execute well.
L8/ A9/ S5.