Is that a joke question, or are you actually serious?
BikeBerry's weak copy of a shift kit can't hold a candle to SBP's tried-and-true setup. SBP might cost more, but you get quality parts and decent support.
It's worth it, if you can wrench. Shift kits aren't for rookies, you need skills. Pablo and Ghost sell what they engineer, they know just about everything about what they sell.
BikeBerry doesn't know jack squat about anything they sell. Bike Berry's shift kit uses junk **** parts, like most of the products they _resell_. Tech support? LMAO
In the long run you need more skills to run their shift kit, because much of it will need to be replaced pretty quickly.