Bosses are repeatedly described as memorable, challenging, visually striking, and a highlight. Some caveats mention long bosses, weaker early fights, or boss-run friction, but the overall evidence is highly positive.
Boss design is mixed. Several reviewers praise memorable, mechanical, or difficult encounters, while others criticize inconsistency or overly easy/fast kills with strong builds.
Boss-like threat design is weak in the available evidence. One review says the late-game big bad was more frustrating than frightening because related mechanics failed.