Ditto the above, its been great on the road bike for any ride up to about 150 miles or so. After that it feels like it needs re-applied.
As soon as you get it wet though, the clock is ticking. I think I managed a 70 mile ride in the pissing wet before it had all washed off, and equally, even a small dousing at the start of a ride can be its undoing.
I’ve kept it for the road bike as the road bike is generally a fair weather one day machine, and Squirt does make the drivetrain feel brilliant. Its going nowhere near my mountainbike again, lucky to get 50km out of application (maybe slightly more if its perfectly dry).
And yeah, if you apply it and don’t let it dry it will keep the chain quiet (long enough to get you home) but will need reapplied pretty soon.