User reviews reveal a mix of excitement and criticism for 'IT: Welcome to Derry'. Many praise the series for its emotional depth, particularly the shocking and poignant finale, and its faithfulness to the original book's atmosphere. The horror elements and character development are well-received, though some viewers found the series starts slow and the integration of military themes somewhat off-putting. Overall, the series garners appreciation for its storytelling and visual execution.

👍 Emotionally impactful finale

👎 Slow start and excessive military themes