I wouldn't recommend using a ghillie suit. First of all, you instantly label yourself as "that guy", and it forces people to bonus ball you. With all the padding the foliage adds, you'll be getting a ton of bounces. People know that most of their shots will bounce, so they'll really light you up so that they can guarantee a break. I know that sometimes at the field I frequent we make a rule that bounces count on bush-humpers.
But if you're dead set on getting one, get one that doesn't come with anything on it except webbing or another way to mount your own foliage on it. It will be much more effective at concealing you if you use natural foliage because it naturally fits in.