The sad thing is that some times I get a sense that we as members take this ordinance for granted. For ourselves, we are often given a blessing with the confirmation. I don't remember anything my father said in mine; I was 8. But in the temple, it is just the confirmation. It takes maybe 30 seconds to complete this ordinance. It goes by quickly. We know the words, but we don't often think of them. And I think we gloss over just how magnificent this ordinance is.
We receive some amazing gifts in this life: a physical body; a chance to grow in all aspects; agency; repentance and forgiveness; prayer; the ability to love and laugh; best and most importantly, the Atonement. I think 'the privilege...to receive continual guidance and inspiration from the Holy Ghost' is a gift that ranks right up among these. (Quote found here.) So, even though the ordinance in the temple goes by so quickly, and you can perform this vicariously for 5 people in so many minutes or less, it would behoove us to 1) give thought to what these deceased people are receiving, 2) remember this same gift that we have received for ourselves, 3) show gratitude for what the Lord has so graciously given.