Regular buyer on this site. 80% mobile and electronics at my home is purchased from flipkart. So far did not faced any issue regarding the quality of the product. Faced small issues like delayed delivery or no update on delivery.
Ample choices are available on the site. Recently flipkart has shifted their focus on mobile app offering more options on app then desktop website.
No idea if this move has helped them but surely have made me search for other similar options for online purchase. As for me using website on desktop is more comfortable and economical then on mobile. Hope flipkart understands this and think over the move they r making. Good luck for the future.