"Unique" may be the most misused adjective in the English language (except "ironic" - you could probably write a book on that topic). People often recommend something that was "quite" or "very" unique, much to the consternation of professional pedants like us. Uniqueness is an absolute quantity, that of having no equal. Another perspective is that everything is unique, because nothing shares all of its qualities (including physical location) with something else. Therefore, even correct use of the word may be meaningless.

We humbly suggest alternatives. "Unusual" and "distinctive" are words with a similar meaning, but they allow for comparison. Additionally, you may want to consider emphasising some aspect other than the peculiarity of the thing you want to praise - after all, something could be unique and wholly unpleasant. In this case, "wonderful" or "marvellous" might be better suited.