Excellent, although I didn't watch this specific series (Prime), I liked it as a design and bought it for my collection. If I were to buy it for a child, I would think twice due to the slightly complex transformation, so only if it was intended for someone over 8 years old.

It is quite complicated even for an adult.
As a construction, it is quite good but as transformers quite difficult and it is difficult for a child to love it when they cannot understand it.