The Ancient Magus' Bride is a wonderfully weird anime series. Even though "the mage's apprentice" theme is a pretty common trope, the show feels unique and is unlike anything I've ever seen. I enjoyed it start to finish, even though it feels more like a setup for following seasons than a standalone. The main antagonist is introduced early on, and seems to pose a serious threat, but is then soon forgotten about to make place for world building and (side)character development. This is not necessarily a bad thing, but the first season of this show does lack plot and mainly focuses on the main characters bonding with each other, and meeting all kinds of different characters in all kinds of different places. Although present, exorbitant use of magic is rare, so don't expect a flashy action-packed experience.
As of now I rate TAMB 8/10 stars, but it could very well turn into a 9/10 rating if all the setup pays off in later seasons. The show is a breath of fresh air and I would recommend it to anyone looking for a pretty and relatively slow paced fantasy themed anime. It's beautifully drawn and benefits highly from hd quality.
