This is the best smart phone. Being the pioneers in touch screen technology Apple’s touch response is the best. If you want to see the difference then use iPhone 5 for 10-15 minutes & the use any premium smart phone, you will see the difference.
One most important factor that everyone should know before expecting value for money you spend on this masterpiece is that 3G is a must in this.
Another important thing is the problem in power button in many iPhone 5. This problem is accepted by Apple as an engineering defect. Please go to Apple store and tell them about this - The company will replace it with a brand new set. This is mentioned on their website too.
Battery - I use my iPhone 5 for official calls & it was becoming a pain for me get it charged. The solution is power case. In market & also on websites these power cases are available not less than 2500 but on Alibaba.com I got one for INR 600 ONLY.
Once you start using an iPhone you wont even look at any other smart phone.