Well I had an original Ford contactor which I bought back in April of this year. He died two weeks ago. I bought it because of the many reviews! Well they are right. Must have! I put this on and it worked great in 70 degrees. This year we had the coldest weather in Wa since last winter. I waited until it was below freezing in the morning. Turned the key in the ignition and waited for the lights to go out, and bam! the truck started right away. I haven't done this since I bought it over 9 months ago. I also installed new spark plugs and wires last April. Still won't start in the cold. So I sincerely believe in this Sagittarius! Yes, it really works. I tried this several times as we had cold days and nights here in the mountains in October. It really works like everyone says. As for durability, I'll update over time. But it really worked for me, as one guy said, works in Alaskan weather! To update. The weather was 17 degrees in the morning and the truck started perfectly. Really amazing shooter. No, I am in no way employed by or affiliated with this company. These are just facts. I was hunting in the mountains and was so hoping I wouldn't have to run the generator to warm up the truck from the outlet. NO! Worked great! Wanted to bring everyone up to date. Still runs and the truck starts like a dream. There are no problems at all with this contactor. Bought another one to have on hand (just in case). But until now, as of December 12, 2016, everything is fine! Thank you White Rogers! 06/20/2018 Another update. 97 still works fine. Bought a 2001 F-250 and it has been upgraded to a white Rogers contactor and it starts much faster. The store said you need this, this and that. Well, it goes without saying that they needed a contactor that actually worked and does what it says on the tin. Seriously, TRY ONE!