Is IP Accelerator worth it ?

Here is a quote from one of the IP Accelerator firms

Enrolling in Brand Registry through the IP Accelerator Program does not mean you can immediately enforce your brand protections. Brand owners who enroll in Brand registry through the IP Accelerator Program will not be able to report counterfeits or hijackers until their trademark is registered. If you have superior rights to a trademark and want to enforce your brand, you should consider alternative forums.

https://www.mavenip.com/blog/amazon-brand-registry-and-the-uspto-process/

I have found other law firms that offer better pricing and support for USPTO trademark registry. The downside could be I guess you do not get brand registry at amazon immediately. It worth going through with IP Acc. ? Any experiences on both sides ?