As I had seen all Transporter films and got used to Jason Statham in the leading role, it took some to time to accept Chris Vance - in spite of his charm and abilities (most of supporting cast is not striking either). And unlike the films, the series had evident need for additional sponsorship as the role of product placements - starting from Audi's logo and ending with all connected to France/French - is unusually large.
As for the script, it includes bizarre approaches and elements. Well, the events take place mostly in "decent" Western countries, it is odd to watch Frank Martin rapidly and recklessly driving on city streets, sometimes with shootings, and there is hardly any police trying to catch or stop them; fights are often for fight's sake as well and clothing of the involved remain nice and clean; most real bad guys treat the Transporter oddly in a mild manner, etc. etc.
Thus, it is not a high-quality entertainment, but if you have limited time and not eager to ponder on and over all the time, then Transporter: The Series is still more than okay. Although there are casual flashbacks and references to the past, you are not obliged to watch all episodes in strict sequence or missing some of them - you will still get a picture what is going on.