I redeemed 10 Lakme vouchers in Delhi for my sister, my mother, and myself. It was an amazing experience, really enjoyed it. They even gave us free coffee, mocktails, and sandwiches.
None of the salons in Kerala accepts vouchers. It's some shady business trick used by these franchise owners. I complained to lakme and HLL but nothing happened. One guy called and told he will fix it in some weeks. But it was all in air.
Finally I sold it to someone for Rs 500 per voucher.