Machine is mainly for gaming and the occasional browsing online. Started with only the 2400G for graphics and that worked really well. It played most games at about 50-60+fps on medium settings, extremely good considering its an apu. Recently upgraded to the RX580 since I only really do 1080p gaming and I dont need anything more powerful than that. Also since I just recently bought the 580, it came with 3x games as part of amd promotion so that was well worth it. Haven't had any issues with the card and now plays everything on high settings like butter.
Temperatures haven't been an issue on either the APU or the 580. It is really silent even when gaming for a long time. Only issue or struggle I had was cable management in this case. There is very little room in the back for all the cables but was able to stuff some cabling inside the bottom most hard drive cage and is not noticeable from the front.