Someone posted pics with the back off in a forum. Movement looks tiny in the case, doesn't look solid or high quality, stem looks very thin and spindly etc. Looks made to a price very obviously.
The DD (Dubois/Depraz) module is what sits on the standard ETA 2893 movement and provies the chrono functions. Search the web for never ending discussion on it vis a vis reliabilty, servicability etc. Basically 99% of watchsmiths won't touch it if it breaks and will just replace the whole module ($$$). Basically you'd be [censored] to have one break out of warranty (after 2 years, or if you bought it out of warranty) and then send it to Rolex who proceed to charge you for a new chrono module or even new movement. All speculation right now of course but it's basically the same movement and module as many other manufacturers use.