PERL Cosmetics review for Blockify Fraud Filter, Blocker

We're under a DDoS attack which thankfully hasn't affected our store but did cause us to incur a $11,000 bill with our SMS provider as the bots were inputting spam phone numbers triggering the sign-up message that we were being charged for. I was advised by Shopify to install this app to prevent VPN traffic from accessing our site, as it seemed it was all UK traffic (we're UK-based). The team at Blockify informed me the attackers were using a VPN & helped me set everything up to prevent the attack. Very pleased with the service & wish I set this up sooner to prevent all these headaches from this attack.