The issue I had with the current HP Omen thing I have is it fucks up with installing different versions of windows. I tried a few times the first day and just kinda gave up on it. Basically it has the windows install saved up in there somewhere so that if you format for whatever reason, it'll reinstall windows on its own(I guess for retarded customers). The problem is it fucks up with normal windows installs too. I was trying to get the professional version installed, and as long as I had a USB stick in, it'd work normally, but then once you install the pro version and reboot without the stick to finish the install, it'll start the install process of the home version that's saved on the PC directly. Annoying shit so eventually just installed home.
It has some shitty program thing to configure stuff too, but seems you can just uninstall it after changing a few things(fan speed profile and such, which sadly isn't actual fan speed and more like high/medium/low stupid shit).
Overall, it was annoying, but the price was good at the time for the components, so don't regret it too much. Oh it heats up like a motherfucker too, was planning on changing fans but wasn't sure it was gonna help so I'm just playing with the case open. It's not really noisy on idle and a bunch of games I play don't push it far enough for it to make noise either(FFXIV and MH Rise for example basically run on "idle" or so, so barely makes any noise). Obviously bunch of dust will accumulate inside this way but I can just remove that every now and then.
I wouldn't buy one again if I have the choice, but there's not that many options due to shortages.