Influent is a great pastime for all language learners out there. Be warned, though: Influent is only about words. Forget the detailed explanation and examples given by Duolingo. Influent only tells us the gender of the words, their writing and their pronunciation.
This is not necessarily a bad thing as the interaction with objects (image association) greatly helps learn all the words. The very early on unlocked "Time Attack" mode tests our knowledge by randomly picking objects we've already found. Well, random is not a must but it is best not to test our short-term memory so let Influent pick from the entire list as it sees fit! Naturally, the more words we add to our vocabulary the greater challenge it will be to remember them.
To make it harder we can hide the text and force ourselves to listen closely to the recorded audio. Adjectives and verbs are not available at the beginning; by successfully completing the challenges we earn stars - these can then be spent to unlock the related words. Note that some of the objects are tricky to find: by pressing ctrl we can look at objects in a more detailed way. For instance, looking at the bed only yields us the word bed itself but by pressing ctrl the words mattress, bed frame, pillow and cover sheet can, too, be learned. This child-parent relationship adds extra fun to the exploration. The computer on the guy's desk is another example: pressing ctrl makes the keyboard, mouse, speaker and display available.
--- A great way to help us learn a new language or improve upon our existing knowledge.
--- Objects are many and varied: thanks to Influent I'll surely remember the word stapler in French. :)
--- Only 420 words... the apartment is nice but we could go elsewhere. For instance, we could visit the parents at their house which would allow us to see the garden. A house also has a cellar and a loft thereby allowing us to learn more. Not to mention the added pets or other animals as in the flat we only have a cat.
--- Expensive. I find 10 euros a bit much for one language pack. Duolingo is free which lacks this image association technique with the interactive gameplay but greatly makes up for it with more topics and - most of all - grammar.
Still, Influent is a great concept and hopefully it'll be expanded upon with new words & places to visit!