I think it's perfectly appropriate. It wouldn't look good on me so I'd never wear it but on the right person I think it would be exciting and flattering. It's very fashion forward. Your SO may be used to more subdued dresses but if you can carry it off, it will be a standout.

Are your reasonably tall and slim?

I'd avoid this color/pattern if you are a redhead.

Keep accessories simple. Maybe silver hoops.

If you answered all the above correctly (LOL) - go for it! It looks like a dress someone would wear who loves to have fun.
2/c Coarse hair med. density.
Highly porous. Color over grey.
I love all the Curl Junkie products. Still experimenting with gels and curl creams. Still hoping for 2nd day hair....
Every day is a gift