if you think you want to watch this because of "Texas Chainsaw Massacre", then please don't. Or don't put such high expectation. "Mortuary" is nothing compared to TCM.
the movie is NOT horrifying at all (exceptional to those who are 'blood-phobia'. sorry, my vocab is limited). the concept of a mortuary is something catchy and supposed scary, but the storyline spoils it. luckily, the ending is not so lame.
the fates led by the main casts are so predictable. and the zombie part thrills you, and i mean, thrill as in, make you happy. the audience laughed... the way the zombies appear is kind of funny, and it only scares kids, i guess.
the 3D effect is not very good, as in, not suitable. it makes the whole situation looks fake. and at some point, there is some gaming elements in it... weird... even the sound effects.
it's up to you if you want to watch it, but i'm telling you that it is not a good choice if you want to scare yourself. it might be something, if you want to have a good laugh.