From the same link:

'"Aaland wine expert Ella Gruessner Cromwell-Morgan, whom Ekstroem asked to taste the find, said it had not lost its fizz and was "absolutely fabulous". "I still have a glass in my fridge and keep going back every five minutes to take a breath of it. I have to pinch myself to believe it's real," she said. Cromwell-Morgan described the champagne as dark golden in colour with a very intense aroma. "There's a lot of tobacco, but also grape and white fruits, oak and mead," she said of the wine's "nose".As for the taste, "it's really surprising, very sweet but still with some acidity," the expert added, explaining that champagne of that period was much less dry than today and the fermentation process less controllable.'