Got my part yesterday, only 3 days! Very fast shipping. Put it in the pc and it's working great so far! (5 stars)
That's 90% of all reviews from websites. 9% are the ones that say 'took forever to get here, and it was broken, the box was crushed, so don't buy this product'. (1 star)
The last 1% (3 stars) are the only ones worth reading. They'll generally have pros/cons as to why the stars.
Just take any of the reviews with a grain of salt. 99% are written in the first month of ownership, be it 5 or 1 star, the joys/pain of dealing with the product/company are extremely quickly posted. You'll never see a post starting with 'i bought this product 2 years ago, and it's working great still'. This'll put an extreme bias on whatever is reviewed.
This I'll say about pre-built pc's. They run cheap. Very cheap. They sell at a higher price point than they are honestly worth. They have to. Someone ordered the build, someone built it, someone drove it somewhere, someone did inventory on the parts. There's a hundred ppl all had their fingers in that pie somehow and they need to be paid. So to get profit, you add product to manpower to parts and then up the price. Basically, those $700 pre-builts are worth @$350-400, the rest being profit and payout for various labor charges. In order to get such low cost units, corners are not just cut, they are massacred. Expect the lowest price and quality psu, mobo. Expect special edition gpus that are B-grade, most often failed units that keep the name but have components disabled at the factory. Expect the worst.