Myntra is the very good website for shopping. When you order anything branded items you never face any complaints. I use myntra last 2 years and feel awesome. When any sale started on this site the discount cost is very high compare any other sites.
myntra use only branded quality products to sell. so there are no chance to fell sad after purchase any item on this site.after visit any branded outlet u can compare prices and product description on myntra you found same quality product on discount price.
I order many items by myntra and got them every time on fix delivery time. some time when any biggest sale started on myntra so due to rush myntra delivery time show to long but delivered before time. this is my personal experience on myntra.
you can use both website and app of myntra but I suggest to use order by app because this is designed simply to understand and category wise discount you found very easily.
in my opinion myntra is very reliable because I use myntra and satisfied with service provided by team myntra.