I was a little hesitant to buy this gaming PC from some of the reviews, but I figured there is always a risk with any new rig you buy.  Dead parts happen, I am not a pro by any means but I can fix up some things.  Other reviews on what to do really helped with additional mods for this thing.I ordered a few Noctua fans, which, by the way are extremely quiet and efficient.  For the top - grab a 140x25mm fan.  You WILL need to adjust the liquid cooling screws on the back, slide them down while they are loose, and slide the Noctua fan in.  Tighten everything down, good to go.  Just be gentle as the wires come in right near the fan buy, so don't just ram it in there.  If you don't feel comfortable making any adjustments, grab a Noctua slim fan 120x15mm, and it will still mount in there fine.  The holes are for both types of fans.For the bottom, just grab yourself a 120x25mm static pressure fan(since it has to pull through a filter), remove the mesh filter, screw it in, put the filter back in place - good to go.I got the Asus Z390p motherboard, so you will need to use a splicer since it only comes with one open fan header(that I could find).  A splicer is included with Noctua fans, and the open header can be difficult to reach, but it is doable.  On this board, it is located right next to the CPU cooler.Also included was the Gigabyte RTX 2070 Super, which I am pleased with, and XPG Adata 3000 mHz ram which is higher than advertised, so that's a bonus.  Pretty sure the PSU is an Apevia 800 watt, which is probably the only "bargain bin" part on this, but it hasn't given me any problems so far.The wiring was pretty clean, but if you are planning on installing the Addressable RGB card that they send with the Asus boards, it can be a huge pain because it's pretty tight, and mine did not come pre-installed.  Not a deal breaker, but that's really the only drawback I've come across with this machine.It's not overly loud, even with the additional fans, and I have had no heat issues.  I installed the fans when I checked everything over after removing the foam.  Everything came screwed down and wired correctly.I haven't had any performance issues at all, this thing absolutely flies.  If you're willing to spend $50 on quality fans, I don't think you'll need to open this thing back up for a while.  I'm not sure why they didn't put those fans in, but again, for the price($1400), I wasn't able to find a better deal with these parts.  If anything changes, I will update this review, but so far I am extremely pleased with my experience to date and what came with the PC.