I lived in Northern Alaska last year surrounded by mountains. It was fun to watch this from time to time and estimate how much longer it would be before we got sunlight again. It kept me sane. :)
Totally love it! It's a fun little addition to my desktop. ^_^ Plus, I know people all over the world so it's more effective than just knowing the time conversions to know if it's dark or not.
Like the cycle option but I found it made it unclickable while it was cycling the year and I had to close it in my widget dock to get it to stop. =\