Could be could be an honest question, 188 post since 2005.
I will treat as an honest question.
Well yes there are horror stories, many have reported issues with this engine.
That said is the truck stock?
Has it ever been chipped?
Has the engine had major repairs?
Has the engine been "Bullet Proofed"?
How many miles?
Keep in mind that to be a horror story in this day of the internet needs to be about a 1% to 5% failure rate.
There are many on this forum that report great service, there are also reports of a great engine going south on a trip costing $5,000 to $15,000 to repair.
If you did your home work on the truck you could have a great towing truck, or it could drain your Bank account!
That said as a Ford man for 45 years, I chose to take a chance on a Dodge truck wrapper for the Cummins engine. That was one of the best choices I have made.