Samsung galaxy j7 2015 is a smooth device.
generally as other samsung devices has a user friendly operating system this one also has a user friendly operating system.in apps section you can sort apps alphabetically. you can quickly uninstall them one by one. there is also feature of searching an app that user wants to find. it has plastic body backside but it absorbs shock when sometimes it falls down from our hand. it comes in two colours that are WHITE and GOLD. it has 1.5 gb of ram and 16 gb internal memory. there is 5.5 inch super-amoled display, which is that much big truly.as it supports HD recording with 13 megapixel back camera, you will require to extend memory of it. I have extended it with 64 gb of memory card. and truly it works smooth with that much high storage device also. if you will think about reliability then you dont need to worry because the strength is as good as other samsung devices. and of course it never gets slow down or hang during heavy operation also, so its really value for money. I am using it from past 7 months.