It's easy to use, it has all of my tools (from BCC filtering/DMARC validation) in one place so I can easily monitor them at once! The price is very fair for what you get with this service; there are other companies that charge much more per month than we pay here but do not have as many features or services available when compared side-by-side against us using mailchk Pro vs their free version - which isn't great either btw because they don’t support DKIM signing nor SPF verification outbound only incoming like our Free Version does). We're solving two problems by combining these things together into 1 tool instead having 2 products &"services".