I still drink Celestial Seasonings and I have toured the factory here in Colorado on a few occasions several years ago. I most enjoy their herbal blends--Raspberry Zinger, Wild Berry Zinger, etc. To remedy insomnia associated with my extreme hormonal nocturnalism during the week, I often drink cups of the Sleepytime Extra (with calming Valerian)--it seems as if valerian-root-containing tisanes are difficult to find in loose-leaf varieties. One decaf blend of Celestial Seasonings which I particularly enjoy almost to the point of adoration is the green lemon-jasmine blend (labeled 'Sleepytime', which is odd for a still-caffeinated decaf tea). For a bagged tea, it's remarkably delicate, with a subtle yet delicious and comforting flavor which doesn't seem to change at all in response to temperature, steeping time, etc. I've noticed, actually, that quite a few of the CS blends never seem to become astringent or acrid/bitter regardless of how hot the water is or how long they are steeped, and I always prefer drinking bagged teas gongfu style, without exception. I also find the pillow-style tea bags of CS to be preferable to those of Lipton and other bagged tea brands, with no unnecessary flags/staples/adhesive/strings/wrappers.
Edit: Recently at the grocery story I observed a display of holiday-themed CS tisane blends, with the rather pretentiously-named 'Sugar Cookie Sleigh Ride'. Sleigh Ride flavor?
Oh, how I wonder what sleigh rides taste like! I can't wait to taste this one!