I can provide first hand knowledge about MotoBatt from the point of view of a company that sells all kinds of batteries including MotoBatt, Adventure Power, Moto Classic, Braille, Odyseey...and get regular customer feedback.
The MotoBatt batteries tend to have up to 30% more CCA and/or AH compared to the OEM.
Even though they have a 2 year warranty there warranty rate is lower than other brands that have a one year or six month warranty.
The 4 post design comes in handy for adding accessories.
The price/value ratio is often the tipping point for buyers and they choose MotoBatt over some of the more expensive premium brands.
It is made in their own factory in China

and is not outsourced.
The MBT12B4 is very popular with the 650 Vstar and FZ6
Any other questions regarding power sport batteries...? That's all we do and would be happy to share what we see on this side of the counter.