Got a U8 last week from aliexpress, still evaluating it whether to keep, to sell or to return it... going through love-hate relationship with this tablet... 
Upgraded to latest English firmware downloaded from Pipo website, no more chinese apps.
Bought Sandisk Ultra MicroSD 64GB and reformatted to NTFS and it worked fine with the tablet.
Tried flashing custom firmware from Riley but touchscreen became a bit crazy so now back to the official firmware
Wifi is quite weak and slow to reconnect after wake up from sleep...
Battery life is quite good, standby eats very little power.
USB charging is good, but only 2A charger works.
Some apps not compatible (e.g. Streetdirectory Map) or cannot run (The Sims)... custom firmware should make more apps available/compatible but more research needed to get some other apps to even work at all...
Can't wait for more official firmware updates to hopefully fix apps compatibility and wifi issues!!

Upgraded to latest English firmware downloaded from Pipo website, no more chinese apps.
Bought Sandisk Ultra MicroSD 64GB and reformatted to NTFS and it worked fine with the tablet.
Tried flashing custom firmware from Riley but touchscreen became a bit crazy so now back to the official firmware

Wifi is quite weak and slow to reconnect after wake up from sleep...
Battery life is quite good, standby eats very little power.
USB charging is good, but only 2A charger works.
Some apps not compatible (e.g. Streetdirectory Map) or cannot run (The Sims)... custom firmware should make more apps available/compatible but more research needed to get some other apps to even work at all...
Can't wait for more official firmware updates to hopefully fix apps compatibility and wifi issues!!