For a costume, this thing looks really neat. If your son is planning on wearing this for only a few hours on Halloween night, it's fantastic. Very dramatic, very sleek looking.
HOWEVER, there are some things you're going to want to keep in mind.
1- It's small. My son is the shortest in his class, I ordered a size up for him and the sleeves still didn't go all the way to his wrists. Same with the pants. Keep this in mind when picking a size.
2- The laces to tie up the leg cuffs, arm cuffs and chest plate are pretty cheep. Be careful while lacing them up. On Halloween night you may want to pack yourself an extra set of black laces just in case the ones that came in the package snap. Also keep in mind you'll be doing a lot of lacing every time your child wants to wear the costume as it isn't possible to put these on or take them off without them.
3- The black fabric is pretty thin. You might want to have your child wear a black turtleneck and/ or dark pants underneath or instead of the ones provided for the costume, especially if you'll be outdoors and the weather is chilly.
4- The imitation leather tunic promises not to wear well. The fabric tears easily, so keep that in mind if you're looking for a costume your child will spend multiple days playing in.
5- Make sure to note the written description because despite what the picture would have you believe, the costume does not come with gloves.
It sounds like I'm being overly negative about this costume, but I want to assure you I am fairly pleased with it. For the price... I would have expected better quality. But it does look very sleek on my son and he is thrilled with it. I do wish I had known about the thinness of the fabric and the cheapness of the tunic before I had purchased it... that is why I can only give it 3 stars.