Developers love reviews on the app store, well, at least good ones anyway, and these can help in a big way. Of course if you don’t like an app then then I’m not suggesting you write a good review, that doesn’t make sense. But often people use the review mechanism for all kinds of strange things that don’t help the developer, don’t help other people trying to read reviews to get a sense of the app, or anyone else for that matter.
So, please don’t complain in a review if there’s a support problem, as developers have no way of responding to app store reviews and it is a constant source of irritation from what I understand.
So if you love an app then tell the developer by giving them a great review on the store.