Yeah when I was looking into transmissions to kill some time, next gen definitely has a lot of controversy.

From a bunch of Facebook failures post with evidence of failures, especially his custom valve bodies.

His BBB has horrible reviews, also says all his bad Yelp/Google reviews get deleted.

His transmission address is the same as another transmission shops, (which is really weird), also seen post that he doesn't have his BAR mechanics license (not familiar with California Law also not sure if true).

As I have not seen this stuff in person however and I doubt tons of people are lying (always going to get one or two pissed off customers who lie or turn up the power then break something), even if he his a good transmission shop I don't want to deal with all that drama and wait time.

Last is with his warranty it's pretty much non existent.

Again saying this is just what I have found online through basic searches not even paid searches, have not seen the stuff in person.