Conjuring 2 is semmed to be good at all but its not able to fulfill the requirements because the story was not good enough and there are less horror scenes so any true fan of horror films does not satisfied at all.
There was a expectation from conjuring 2 because of mind-blowing part 1 of conjuring. So, basically its a cool movie but not amazing. So atlast I will suggest u to watch conjuring if you are a horror film fan.