When we talk about Mi the brand it self is good.I hav been using it from past 1 year both Phone as well as powerbank. The backup of this powerbank is amazing for an average price.It can be used for atleast 3 phones to charge full.When we talk about its design there is no chance of telling anything about it as it has such an amazing design for such an cheap price.The price is also less for this powerbank.But the thing is that it gets heated soon.It lasts for more than a month when not used it.