So, Overall the game is, Goodish.
Pros
Has the best of Castlevania SOTN and OOE, the factors being having SOTNs seemless large castle map, and OOEs base to restore and buy gear.
Controls are fairly Simple and follow the basic rules for the movesets of SOTN, if you have played any Metroidvania most skills will be very familiar.
Basic Enemies never seem to strong expect the rare black ones....BUT, bosses....! (Look to cons)
Warp and save points are generously spread out so there's plenty of points to head back to base and restore or save.
Mehs
Not all enemies have H-Scenes, wish they did.
You have to lose to bosses to see the CGIs, but you can refight them in the enemy room so if you miss it, its not that big of a loss
Minimalist graphics, meaning is runs good on low-end rigs but the non-CGI H-scenes are..eh
Cons
Bosses are pretty bullet spongey taking longer then they need.
No basic gallery, have to find the enemy you want in the enemy room and hope your EROS are high enough