For the most part, people have been pretty happy with the iPhone 6S, and that’s a problem for Apple. Whether the last few iPhones were as innovative and revolutionary as Apple and its fans claimed is a point of contention, but enough people believed they were that the company was selling absolutely insane numbers of the smartphones. The iPhone 6S, on the other hand, hasn’t enjoyed nearly the same level of success as its predecessors, according to a Localytics study, because even the die-hard Apple fans agree that it’s a decent smartphone. Emphasis on the word “decent,” because when customers are used to massive upgrades over previous smartphones, something that’s just decent doesn’t cut it.