The F+F dress doesn't look bad, but F+F's quality varies a lot. I'd stay away from any custom orders.
As for Milanoo. . The thread says not to buy from them for a VERY good reason. They're scammers and liars and create fake blogs to advertise their products, and they used to harass people on egl who left bad reviews on their products. Seriously, just Google "Milanoo review." You'll see how terrible their dresses are.
I own a pair of "decent" bloomers from Milanoo. The lace is horrid, as is the sewing. I wouldn't buy from them again.
As for the dresses themselves. . It's often advised for newer lolitas to stay away from the black/white combination, or any contrasting colour combination, and for good reason. A lot of people new to the fashion don't have the experience to know bad lace from good lace. Not saying anything bad about you, it's just common.
Contrasting colours make bad lace stand out even more, and Milanoo is notorious for its bad lace. It'll just look bad.
tl;dr Milanoo makes horrid products don't buy from them
If you want inexpensive lolita items, then go to Bodyline or Taobao.
Sorry if this seems too angry or rude; it just really isn't hard to Google reviews of companies.