I made some inadvertently over the Christmas vacation. I left 2 growlers of some home made cider in the snow to chill at the in-laws house and it snowed like crazy over night. The roof shed a bunch of snow and the growlers were buried. I forgot about them for a day and when I pulled one out, it had a nice core of ice in the middle. We poured off the liquid and it was very tasty. Definitely stronger and also felt that it had a better flavor. I'll do a 5 gallon batch later in the winter or next year. Have fun!