"A bit underdeveloped ... and this system(old) :/"2.5 starson by Ant_Poland
Pros: *Good price-quality ratio
*Offline GPS (but very slowly)
Cons: *Sometimes it can lag
*Old Android version (update is not planned)
*Can't be used as an OTG USB slot (You can't connect pendrive or 3G modem to this tablet)
Summary: As the price of the product as such, its performance is quite good. The workmanship is also satisfactory.
If you do not want complicated options and looking for the device for browsing or navigating, buy confidently.