I give these four movies 5 stars, they are the beginning of one of my favorite TV shows.
I want to give you some insight into the difference between this release (Echo Bridge) and the original canadian release by Salter Street. The Salter Street releases were four separate movies in individual cases, while this release is packaged in a kind of "book" style. The disc's carrier slides out of the cardboard sleeve, which has some nice embossed features of the graphics. It carries, as someone already noticed the image of Xenia Seeberg (Xev), who replaced Eva Habermann (Zev) a few episodes into season two...
The carrier itself opens up and holds two discs on each side. Overall, the package is only slightly thicker than a single DVD case. To note is that the slider is sealed with some non-removable tape. It needs to be cut and can not be peeled off without damaging the box.
The 4 movies are "bare bones", none of the extra features of the canadian release are included here. These were an interview with creator Lex Gigeroff, a behind the scenes featurette, and some panels with information about the characters, for each of the four movies. Those are interesting for hard core fans, but not necessary to enjoy the show.
Also, the separation into chapers of each episode is different. The Salter Street release had 9 chapter marks per episode, while this Echo Bridge release has 10 each, at slightly different points in the story. The video quality of the episodes, as far as I can tell, is identical.
Other than the missing extras, this release is, in my view, recommended.