...as silly as it may sound (for those who know/have seen this film of course) it is true.
Around the time this film came out, I was living in France. It was on TV one night, and decided to record it for some inexplicable reason.
I cannot remember the way I felt the first time I saw it, but I know that it became my favourite film at the time(yes, I was very young back then...),and watched it over and over. In fact, I watched it so many times that I knew the order of the scenes, the dialogues word by word and the facial expressions as well. I remember I used to recite the whole film in my bed at night, when I couldn't sleep.
I loved the soundtrack, the characters (especially Didier, played by Alain Chabat, who is by the way a very famous actor in France) and everything about it. The funny thing is that at my age at the time, I didn't find the whole thing silly, since a kid wouldn't find 'Tom & Jerry' silly either, why would he find silly a story of a dog who one night changes into a man who behaves like a dog? In fact, I kind of considered it as a comedy, with serious dramatic elements.
Many people will probably find it stupid, but even today I find a certain charm about this film, and I do think that it's a very entertaining, funny little comedy. If you like the plot, you won't be disappointed, because as silly as it is, it's well executed, with very good jokes.
Check it out if you can, and enjoy!