I have the SpareParts Pete Commando. I love it. It's comfortable, secure, and you have the choice of having cloth between you and the packer or having the packer/STP right against your skin. It does have extra straps but it's not awkward.
But yeah, it gives me a half-boner look. I thought all harnesses did. I'm working on modifying my boxer briefs for more natural packing.