Is Andromeda Insights legit for a custom PC?

I’m thinking about building a custom PC on Andromeda Insights with a Ryzen 7 9800X3D + RTX 5080. Has anyone here ordered a custom build from them before? How was the build quality, shipping time, customer service, and warranty experience?
Also, I noticed their “Brand Varies” RTX 5080 is around $600–700 cheaper than some of the specific 5080 models. Is there a reason for such a big price difference? Is the Brand Varies GPU definitely brand new, or could it be refurbished/open-box/used?
I’m considering ordering from them, so I’d really appreciate any firsthand experiences or advice before I place the order. Thanks!