Amazon is a best place to shop and it is very trust worthy app. I would rate it 5/5. The product will be delivered on time and Quality will be 100%. In Some apps they show one quality and will be in one quality wen received. But, AMAZON is not like that. I haven’t faced any problem till now 5/5 for customer service. 5/5 for product quality. 4/5 for Delivery timeliness. For Apps and Websites I would rate 5/5 and for reliability 4/5. There will be each and everything found on amazon. Totally tension free app and we can trust the product and service.