I don't know, it looks to me like a more expensive version of the Scotchlock taps, prone to loosening, corrosion and contact resistance.
I always strip a short, quarter-inch section of tapped wire, wrap the tapping wire around and solder the junction. Yes, it takes a bit more time - but now it is off-season anyway, no?
Time for bike farkling.
I have had my share of IDC (insulation displacement connector) failures. OTOH, I have never had a solder splice fail on me, even if sloppily made. And you would not believe the amount of add-on wiring on my bikes - I am a hopeless gadget freak. Good connections are a must.