I have been shooting them for 3 years now. In regards to accuracy - they group well but at a different point of impact than field points (not uncommon) only about 2-3 inches. Very durable - shoot, sharpen and go again! As for penatration - I shot the monster attached with one at 18yds through the top of one shoulder and just broke the skin on the other side through the top of the other shoulder. He dropped about 75yds from my stand.