Update to Renaissance New York City Midtown
Current status says "Full brekkie buffet vouchers for elite+1."
You actually get a voucher for Elite +1 that says "Continental Breakfast" however, the buffet included cold meats, cheeses, lots of pastries, croissants, scrambled eggs, bacon, sausage, potatoes with peppers/onions, pancakes, bagels, breads, cereals, yogurts, fresh fruit and included coffee, tea, juice.
So I think I would state "Continental Breakfast Buffet Voucher for Elite +1." It is a little confusing because the voucher does not mention the buffet, it just says "Continental Breakfast." But it does in fact mean the full buffet offerings in the restaurant (for which they charge $26 on the menu!)