Yeah, I eat them as quick energy boost while on ski lift, clif bar isn't the best tasting but isn't the worst either, I've certainly had worse.
But there an advantage to not being the best, I actually use them for what they are bought for, instead of late night snacks...
Oh and the wrapper on clif bar feels like those recycled plastic (I think Lay's chip used them at one stage but changed after many complaints), so that might be one of the reasons for short shelf life.