I used to do that regularly in the sim whenever we had 10 minutes or so to spare at the end of a slot. 10,000 feet or so above somewhere like Geneva; good weather, engines (four) not recoverable.
Most crews made a reasonable job of it and got down to the extent that they would have walked away from the aeroplane.
The biggest surprise was how late they had to leave lowering the gear (bearing in mind emergency lowering). I well remember one captain who was continually pestered by the F/O to lower the gear, got it just right and obtained three greens about 10 seconds before touch down! They made a perfect flapless landing.