CAT Aftertreatment - Anyone having a problem?

First I have seen of this as face plugging is a maint. Issue, what are your thoughts for all brands?

Caterpillar Heavy Duty Engine Complaints and Investigation

Lieff Cabraser Heimann & Bernstein, LLP, is a national plaintiffs’ law firm that represents plaintiffs in cases involving defective vehicles, vehicle components, and other products.

We are investigating complaints by bus companies and other operators that Caterpillar heavy duty engines produced from 2008 to 2010 equipped with an exhaust regenerator are defective. The engines under investigation include the Caterpillar Cat C13 and C15 motor coach diesel engines with ACERT technology.

The complaints charge that the exhaust regenerator fails in ordinary use, leading to soot build up, clogged exhaust systems, and engine failure. It is further alleged that Caterpillar has failed to develop a lasting solution to the problem, resulting in continued engine failure even after the engine has been repaired. Bus companies and other operators have allegedly incurred substantial losses due to towing and repair charges, along with having to compensate or provide for alternative transportation to affected passengers.