There are ways to say things that don’t say anything at all. You can write a review of something and never really say if it is good or not. If you are really clever, you can spend your whole life doing this.
Is it actually clever to not really say anything? Who are you fooling? Yourself, or your audience? Is it that you don’t know how you feel about your topic, or that you are afraid of offending someone? It is all too common that someone may get offended by what you say. If you share only noncommittal words, they will continue to listen to you. But both of you are wasting your time.
You could say that something is indescribable. Does that mean that you simply don’t have the words to describe it? Does it mean that you haven’t had the life experience necessary yet to describe it? Or does that mean that you aren’t brave enough to describe it? Does it mean that you are concerned that if you tell someone what you really think it might make them angry at you? Or maybe that it might make them think differently of you?
You could say that something is incomparable, and you’d also be hedging your bets. Everything is comparable. You can compare everything to something else, if nothing else to say how much not like it the item is.
Both of these words are used to make people think that something is really amazing when it might be nothing at all. It might be that it is so bland and boring that the author really couldn’t come up with words that were worthwhile. It is best to say something real than to say something noncommittal.