I love that they are able to block all types of ads from being served in my account, as well blocking bots/scrapers who try their hardest at getting through! There is nothing i dislike about dead bolt's service other than it taking longer then expected for some reason (not sure why). They have been very helpful with any questions or concerns we may come across during our experience using them so far!! We've noticed an overall decrease since implementing into both AdWords & Facebook campaigns which has helped us tremendously when trying get rid off spammy impressions within those channels.