My friend is having this phone I have also used it, but let me tell you the Flagship Lumia series phone are very good but the mid range lumia products are not that great.
They consist of older snapdragon processor , and less ram than the competitors in the same price segment. Also the the windows OS is not keeping upto android in terms of apps, services, convenience. Lumia 535 is having a nice build quality having a decent camera with led flash. The major let down for the phone is it’s Operating system. The OS is maturing by time to time updates but the app gap is still there.