I bought vouchers for all-you-can-eat dim sum at Leong's Legend in Chinatown - it was brilliant value and everything worked perfectly. On the voucher it said to book at least 72 hours in advance, but I managed to redeem it for a booking less than 48 hours in advance. I saw lots of negative reviews after I bought the voucher which had me nervous, but my experience was completely streamline and hassle-free. No problems at all, would recommend.
