fuel injector additive

What is your question?

I just had my fuel injectors cleaned as recommended by Toyota (30,000 miles) on my 2008 RAV-4. The cost to clean the injectors was $155 !! Toyota recommends a fuel injector additive to the gasoline to keep the injectors clean. Are fuel additives worth the money? If so, what brand do you recommend? Toyota had a small can selling for $28 !!