Love it!
Avoid
It is the worst app I have bought for iOS. Specifically: the reviews offer very little opinion as to whether something is good or bad and so give no guidance at all, there is no way to sort or search listings by category, the maps do not show nearby points of interest (important to navigate by because a lot of the streets do not have names) and, worst of all, many of the descriptions given sound like they were drawn from a creative writing exercise by a seven year old.
I should also add that I could not get the 'nearby me' function to work at all.
I strongly suggest avoiding this and seeking information on Santorini elsewhere.