The positive attachment and better airflow are a great improvement over a standard presta valve
Changed over my family's bikes to the Clik system and love the simplicity.
I have swapped out my three bike wheels and my spears tubes.
Having these valves will make on the road flats a breeze to change no longer worrying about bent or broken valve stem.
Worth the price of admission for a solid chunk of aluminum. Significantly smaller than it's plastic cousins and holds better in compression-style chuck heads (the lever type) thanks to metal threads. Not worried about it ever wearing out.
Works as advertised. The only thing that would improve the product is if my local bike shop would stock the valves.