They are ineffective. Stay away from Ticketbust.com. Save your money redditors. I spent $395 on a speeding ticket & another $270 on this company that basically copies and pastes your case.
If & when you loose by trial by delcleration, your left to fend for yourself. If you don't send them the certificate of the lost case within 10 days (not working days, how convinient) you won't get any money back. If your in my situation, send me a private message & I'll send you a similar template these companies use.
TL;DR Your better off fighting tickets yourself.