Tommy Hunkewrote a review of Western Mountaineering Apache MF Sleeping Bag: 15 Degree Down on March 2, 2010
I have had an Apache bag for about 2 years now and it is my go to. One feature that I would like to call out is the stiff lip that runs along the inside of the zipper which prevents snags. Snags are probably the #1 way to ruin your bag.
Another thing I would like to mention is that when you buy a new bag, be sure to look at 'fill weight' as opposed to temperature rating which is defined by the manufacturer. You will notice that WM's bags come with a higher fill at a particular temperature rating when compared to North Face or Sierra Designs (note that both make excellent bags as well and offer features that surpass WM in some areas). WM bags also tend to weigh a little less than their competitors even with the extra fill.
One last item worthy of being called out is that if you order directly from Western Mountaineering, you can get a left or right side zipper and add 2 ounces of overfill to your bag.