Use LegalZoom or you will be nickel and dimed to death with Trademark Engine.
I'm 99% sure we didn't sign up for any subscriptions (as in we didnt voluntarily click to add any subscriptions)...but you better believe we were charged every month for a "monthly" report as well as a yearly "monitoring" fee. It took me months to figure out that we were getting charged and what it was. But it's a lot cheaper than LegalZoom, that's how they get you. Classic bait and switch.
The worst part is that you have to call to cancel (as SO MANY people have mentioned), and the subscriptions are in perpetuity. I do think the subscriptions might be worth it if your company makes multi millions or into the billions. Im sure Taco John would have liked to know when Taco Bell was trying to use "Taco Tuesday". For everyone else, avoid.