WELL, this is short special Episode, it is a Prologue to the Movie Phoenix Priestess. It shows how Eclair became friends with Momon, and what kind of Life did she live, before the Events of the movie. As short Prologue Episode it is very good, especially if you watch it before the Movie. As expected from Fairy Tail the Art and Sound are outstanding. As Prologue, it also makes a good introduction to the characters Eclair and Momon. Eclairs powers, powers of the Phoenix stone, and even the kind of person Eclair is. As for Momon it shown how did they start to share such deep bond, which isshown in the Phoenix Priestess movie.
Overall, truly a special episode to enjoy.
I recommend watching it, before the Movie 1.