I think I should also go out of my way to say that A Profile is actually very good for what it is. However, to enjoy it will depends on why you read A Profile in the first place. If people are looking for a sweet love story (expectation can be really amusing), they're obviously going to be disappointed because of the heroine's circumstances, but that in no way make the actual story less great.
I also don't get all those complaints about Rizu's being very annoying either. She's actually a pretty good imouto character, and her route is the best in A Profile followed by Mio and Miku. In fact, if it wasn't because of G-senjou no Maou true route and the damn epic epilogue, I would say that A Profile is equal to G-sen. Granted, the story and the character isn't for everyone taste and that's the only reason why I don't recommend it to people. An amount of tolerant may be required for some readers.
tl;dr A Profile is great so read it if you think you could handle it.
That is all.