Experiences and conclusions are necessarily based on the individual's subjective perception. Nevertheless we will try us.
Many were initially disappointed when the iPhone 4s came because it was not the iPhone 5 as many had hoped for and expected. Apple allows only a phone of the year, it was suddenly time for many to come. Expectations for the iPhone 5 were among others New design, thinner device, faster processor and much more.
With iPhone 4s we were not all iPhone 5 expectations met, but something was still met, a faster processor. This processor also made it possible to introduce something that may prove to be revolutionary in the long run, namely Siri (voice control). We will certainly see more apps that support Siri before we understand how good this engentlig is. Currently, Siri also a challenge of language since, currently only supported in English, French and German. For the Norwegian market will naturally NOK Norwegian language Siri mean much.
For those users who had the iPhone 4 before it can seem as if you do not get so much more by buying the iPhone 4s, apart from the faster processor and Siri. It may not be NOK functionality to buy a new phone. Those users who have other older brands or older iPhones, however, will get a lot more phone for the money by buying an iPhone 4s. As the reader in the comments mention, the camera on iPhone 4s have been far better than the cameras in the previous iPhone models.
iPhone 4s have had some problems that Apple is trying to fix, this is first and foremost on the battery side. Many claim to be much faster out of battery with iPhone 4s than 4
Conclusion when it comes to switch to iPhone 4s boils down to what your starting point is today, if you have an older iPhone or another phone, then you have much to gain by switching to the iPhone 4s. Do you have an iPhone 4 from before, you may very well live with it, but then it's there that you would like to have something new ....!