All the best things are 'instant', I believe. Meaning that you know right away (it takes less than 15 seconds, come on!) that you like-want-love it.
The same logic goes for the worst/bad things.
But as it is a productive Sunday afternoon full of joy as a researcher, here is a new (unknown to me)Degas, whose lady at a cafe' I fell in love with immediately.
Whatever impression you'll get, it will be instant, too, I bet!