Isse Miyake authenticity on Myntra

Quite surprised to see IM Nuit D'issey Polaris listed on Myntra for Rs 4650. The pricing seems too good to be true.

My questions

1. Does Myntra sell genuine designer perfume? Can anyone share their experience of buying designer fragrance from Myntra

2. I tried Nuit D'issey at duty free and loved it at first sniff. It is known to be a autumn/winter perfume. Does anyone tried it in Indian weather? Can it be worn during not so hot summer evenings?

3. Any thoughts on this perfume. I also like Ambre Noir but it is quite pricey