Teavana was my intro into loose leaf tea and how I discovered this forum. My experience with Teavana was mostly positive, so you can imagine my shock when I read the horror stories here. It felt as if someone said something ugly about my mother.
However, I couldn't escape the fact that there was some aspects that I could relate to my own experience. I think the store near me does good business, so things for me haven't been as severe as it has been for others. For example, Teavana simply isn't a place where I feel I could just walk in and look around. I always walk out of the place a bit overwhelmed at the attention.
I also know now that I spent waaaaay too much for my tea hardware from them. I find myself using a wonderful set I purchased from Ten Tea:
http://www.tentea.com/blulotteaset.html. I love this set, and this is what I use at work.
I do disagree with comments about their tea being poor quality. Their Black Dragon Pearl is the smoothest and best black tea I've tried, their Peach Tranquility is the best herbal tea, and I even love their much maligned Monkey Picked Oolong.
But most importantly, the reason I'll always regard Teavana with some fondness is the fact that I think their brewing parameters are perfect for beginners, and it gave me the self confidence to continue with loose leaf. If I had started with Upton Teas, which is another vendor from which I've purchased tea, I would've given up due to their recommended 3 minutes being excessive for genmaicha and first flush darjeeling.