I have V4, but was fairly neutral about her. Didn't love her, but don't hate her. So I rarely used her. However I'm absolutely crazy about Aiko 4. She fills the sport betweenh V3 and Aiko 3 perfectly. And the faces I can make with her are adorable. For me, she is a winner. I think she is going to end up my favorite girl figure.

PaganArtist, she can take all of V4.2 morphs (++ and muscle), but some of the results are a bit funky. Most work really well though. Here's an face I made using the  Aiko 4 and V4 ++ morphs.

Oh, fitting V4 clothing to her is easy. For this outfit, all I had to do was slightly increase the top's breast size and lift them a touch. It took like maybe 5 seconds.