This mod is a challenge. The final boss is honestly more powerful than some of the hardcover bosses. It is a great module to flex the DM's spellcasting abilities and encounter running skills as well. The Barovia locking is also handled considering it is the last module in the series. It is still best played as part of an overaching run of the previous S4 modules, but as a stand-alone challenging module, it does work well. Some aspects might be tweeked to get to the boss quicker to spend more time there per DM discretion.
[5 of 5 Stars!]