Actually I have bought 2 SanDisk Ultra MicroSDXC Memory Card’s from Amazon.in.
32 GB card for Rs. 630 and 64GB one for Rs. 1389. Both cards perform very well.
Best quality product from sandisk. File transfer speed is very fast compared to regular class 4 or class 6 memory cards. The price difference is not that big between regular class 4 or class 6 memory card and Class 10 Ultra memory card. Also Sandisk products has very good life and are future proof. Just go for it.