To answer your question Capagris, the actress Sonias' manner, position, speaking style, perfect lighting, perfect make-up...etc., the whole presentation is stiff and very un-conversational or, over produced for a learning presentation. Do we really need the words to appear as she waves her hand... and disappear as she blows them away? All the effects seem to be wasting my visual time, meant to entertain not educate.
Maybe the right description is, that she is not engaging. The pace is very slow, she's trying to be too clever, I feel the presentation is distant. I never heard of Sonia Gil before Fluenz. I don't watch current movies or much TV.
What Fluenz has going for it are the lessons. I find them very helpful. The repetition, drag and drop, sound bites, native every day conversation etc. are all well composed and the program navigates/design is good also.
Even though Alexa from 'Learn French With Alexa', is a bit goofy, she is engaging at a comfortable pace. I feel, I get the information Alexa is presenting with conviction, as a native speaker. Her sence of humor, though, takes some getting used too.
https://www.youtube.com/watch?v=Idso96RvnjE
Michel Thomas French method course is even more engaging.
https://www.youtube.com/watch?v=P8jhy7ZQC38