Obviously, the Sager is not built to this same standard. But for a consumer grade laptop, it is built very, very well. Quiet, cool, fast, rigid frame, sturdy, comfortable keyboard, simple, clean looks, high quality screen.

Is Sager platform legit?

It's legit, though buying directly through Sager is generally not suggested, because of their poor customer service. Buy from a reseller instead; I've had good luck with XoticPC.

Is Sager a good gaming laptop brand?

I've had my Sager laptop since 2015 fall, it is indeed one of the best gaming laptops you could find on the market.