The first installment (farm) was very enjoyable and well presented, found it quite unnerving. A few jump scares and a spooky atmosphere. Well worth a watch.
Second installment was garbage. (in the wall) unbelievable story, lousy acting far fetched waste of time.
Best for last...
The final installment was excellent. Right from the start you feel unnerved, very scary/spooky story. Acting is good and finished off the series well.
A must for horror fans.