Intuition liners are the gold standard for a reason. They can cure a number of boot fitting problems which are often attributed to the shell. For me, they are a godsend when more instep room is needed, which is often and do a great job of locking my narrow heel into boots which fit my wide, flat forefoot and bony ankle.
They are almost always warmer than stock liners, which can be a good or bad thing, and can be very high volume when compared to many stock touring liners. If the stock liner isn't cutting it, there is no replacement I could more highly recommend. Life expectancy seems to be about 80-100 days, which seems reasonable to me.
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