I got these boots for Christmas, and I've hardly taken them off since.  They're amazingly comfortable and soft, and they're well-made too.  It's true what they say about the sheepskin; my feet are never cold, and they never sweat.

The only con is that while they fit me perfectly, (I wear anywhere from a 7.5 to an 8.5, depending, and I got an 8) the heel slips a bit.  It's not enough to make it look clunky when I walk, but I feel it.  I'm sort of torn about it, because I know that if I wore thick socks, it wouldn't be a problem.  However, socks are a no-no with these boots.
Wearing them basically nullifies the benefits of the sheepskin, both comfort-wise and temperature-wise.  I'm finding it overly tempting to go to Macy's to try on a pair of size 7 boots, just to see...

One big perk is that the Fall 2010 Stinger Lo is water resistant (meaning that it repels water, but JSYK, these are NOT a rain boot).  It does wear off eventually though (I think the insert said a year?) so I recommend buying one of the kits made exclusively for these types of boots.  I got the one made by Ugg (capital 'U') and it includes waterproofer, cleaner, a spray for odors inside the boot, and a nice brush.

I am so pleased with these boots.  I admit that last year, I was one of those people who scoffed at uggs' (lower case 'u') ugly exterior.  This year, when I found out that practically every boot EVER is in this style now, I shrugged and gave in.  I'm so glad that I did.