I bought Lenovo vibe s1 1 year and 6 months ago. It is still working good, I mean the performance of every phone after a year is not as good as this mobile. It depends on you to maintain the quality of the product. As I said it is working perfectly after a year, so I am glad to purchase this product. The gaming performance of the mobile is also fine and the sound quality is also good as it has two speakers. Speakers of the mobile is also working perfectly even after a year because there are many mobile phones whose speakers does not work perfectly or have some problem after a year. The camera quality of the phone is also good. It has 13 mp rear camera and 10 mp front camera. 8+ 2 mp front camera which gives you the perfect picture. Rear camera gives you the good quality of the picture. It also has an option of panorama. It has dual colour led flashlight which is very helpful in night or for other purpose as it has dual led lights. it also has Corning gorilla glass 3 which is a very strong glass screen. I didn’t use screen guard for my phone. It has 1.7 ghz processor, so the performance of the phone is high. But the battery life is not good as other mobile phones. It has only 2800 mah battery, but it is ok. The price of the Mobile is also ok. It has dual sim 1 4g and other 2g or 3g, the memory is also expandable upto 128gb via memory card. It has Bluetooth version 4.0.1 . The charging speed of the phone is also fast. So, I have bo regret about this product. I am happy that I bought this mobile.