I just received a Raspberry Pi 5 in the US (Digikey). I've put the latest MoodleBox image on it, upgraded the MoodleBox plugin, and things are working just great. I'll provide more information over the next few days / week. I don't have a way of testing how many devices can connect to it.
The case is very functional and well designed. It comes with a cooler/fan. I like the on/off button. Looking forward to buying a battery for the onboard RTC, and seeing how well that works along with the changes needed to support that RTC.