Yeah, their simple alright. Light one off and you don't need a battery or alternator to keep 'em running. I'll give y'all that much. But I like have the power to pull a trailer that weighs TWICE the truck and still stay with traffic. Like I've said for a while now...living with an IDI truck is like living with a ugly woman, hopefully she can cook. Now living with a PSD (especially the 6.0L) it's like living with a supermodel; she might be high maintenance but when your out on the town there's a grin from ear to ear. I'll keep my PSD and get twice the work done.