It’s alright. There’s different modes like free-build and a “career mode” where you run an independent repair shop. The parts are a bit dated (and there’s some oddities, like motherboards only having six screws instead of nine—but they still have standoffs), but the fundamentals are all there. All of the standard parts are represented, you have to have everything wired correctly for the systems to POST, sometimes people drop off PCs without knowing what’s wrong with them so you have to troubleshoot it, there’s an “achievement” for forgetting to put thermal paste on the CPU, it covers benchmarking and ways to optimize systems for better 3DMark scores, i.e. big numbers are not always better (1050 vs 980), BIOS settings etc.

There’s quite a bit that’s oversimplified, but for $5 and a few hours of time it’s probably the easiest way to dip one’s toe into system building. It’s certainly cheaper and less risky than buying $1,000 (or $5,000 lol) worth of components and going into it blind. And because it’s interactive and you can make (and learn from) mistakes, it’s probably better than just watching YouTube videos of other people building systems.