No problems here with TVP. Never had it spoiled if kept sealed from air and moisture. Like other "flavorless" items, such as tofu, it picks up the flavor of whatever you cook it with, preferably a well-seasoned mixture. I use it in spaghetti sauce at home. Definitely don't use it alone!
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey