I belive heat is not a problem, as long you don't by the black one and paste.it directly in the strong sun. The cooling looks very good. I disassembled it very often, because I try to teach the device English or change the firmware. But this sucks a little because the whole system is protected and locked. Out of this point I would not recommend the device. The information based on openwrt is not wrong, but useless. The company changed a lot and not to the positive side. They should not do a commercial with openwrt when they look it like this. Nothing is open.
I completely agree with you.
They announce that it runs OpenWRT when many of the features that OpenWRT supports are hidden behind some big walls.
For example, I do not understand why they announce how big is the ROM of the new nano router (the new small router with AC coming from a micro-USB port), and nobody will take advantages out of that, as they will be limited to what Xiaomi gets out...
They they compare it to TP-Link's 841N and 842N which are more open than anything, and the 842N has a USB port.
I simply do not get it...
The target is not on "developer" users, but rather on users that want connectivity and easy-of-use, much like most of Apple users: do not want to program, but want all the features.
Xiaomi cannot deliver all the features, neither at launch, nor after two years of release of their products.
I am still waiting on remote Torrent download support, English support and downloads from the Mi Router mini...