@Vexira
I bought a GT for a simple reason: I was shopping around for a router with 8 LAN ports and I found a great offer.
RT-AC88U was the other option I had. But price difference balanced my decision towards GT-AC5300.
I'm not into gaming so I'm not really in this product's target.
I was hoping for a super stable router. My old 68U was and still is such a stable product.
GT is not! Even with my super simple and clean setup I'm having a stupid problem: one 5GHz radio vanishing. AiMesh works perfect and most time the router works. But every 7-10 days I loose a radio. And that simply pisses me off! Good part is Asus knows the problem and they are working on it. But this is not a new product so I'm not too optimistic. I don't regret by purchase decision! But I was expecting more from a high-end Asus router.
Maybe you have a specific game related need that only GT-AC5300 delivers. But if you can game without this router, do not replace a RT-AC88U for a GT!