I have had them (bought online, at cost, rather than at highway-robbery finance manager rates) on 2008 and 2016 F250 diesels. Both paid for themselves -- the 2008 had some engine issues and had the cab off twice, plus 2 radiator r&r's (among other smaller things), and the '16 had a DPF failure last year (not sure if that might have been covered under the powertrain warranty though since it was right around 5 years; either way, it would have been 5K). I have a '22 F350 diesel on order and that too will have an ESP. Since the 16's is still in force (8 year), that is also a very good selling point since it's transferable. I'll have a '16 with only 50K miles to sell, and it will still have 3 years worth of warranty; nearly a new truck to the nextbuyer. And if one trades in their vehicle, you can always cancel the ESP early, and receive a prorated refund of remaining time. Diesel-only, I think they are well worth it if buying smartly. Resist the urge of the fast-talking finance manager and do not buy from him. He's always lying :). And NEVER buy a non-ESP warranty.