I’ve been looking at these for my wheel build project (MTB). I’ll be interested to hear the feedback!
They are a bit crazy expensive, but the lifetime guarantee is very appealing. I had a valve snap on me when traveling to a destination. Very inconvenient without a spare or means of biking to the shop to get a replacement. Having said that, I couldn’t find anything about what the lifetime warranty covers, and I suspect it’s limited.
I bought a presta adapter for my compressor with the idea of having the Fillmore’s. Without a removable core my normal straight fitting wouldn’t work, and nor would the Schrader.