David Carroll’s review published on Letterboxd:
I don't think this adds anything essential, nor explores growing up or the passage of time in any particularly meaningful way. There are plenty of bits which are just sort of there because they were in a book (Henry Bowers is a prime example). Not sure anything had the resonance of riding to beat the devil from the first mini-series (but maybe that is the vicissitudes of memory).
Having said all that, this is close to the length of the entire mini-series, and it does not drag. It has plenty of cool bits, and gross bits, and hokey scares that are fun. There is a ritual. It's pretty good.