This is not one of the shows strongest episodes and probably won't go down as one of the legendary ones like S2E4, S3E1 or S3E7, but it's a wonderful start for Rick and Morty's fourth season. The hype for this season was off the charts and the premiere delivered. It served as a great character episode for Morty, therefore sidelining Jerry, Summer or Beth (even though they got at least 1 or 2 cool scenes) and did a great job in executing its premise. At that point its pretty much re-introduction, with probably little effect on the over arching story of the show but I can't deny that it is, like the majority of the show: unique, inventive and extraordinarily funny!
