Simple answer - don't be tempted. I got a Vox just before Christmas last year. The first one had to go back within the week. Next one was OK until about June when it would not restart (just got a green light flashing). Nothing would reset it. Kobo help were next to useless in the end I had to send it to the Netherlands (at a charge to myself of nearly £50). They sent a new one back as the original was not reparable. I then had to restock my books and apps.
Today the same thing happened again. I now have a useless bit of plastic with a green light flashing on it. I am not going to pay that money to have then fail to fix it. I will go out and buy myself something from a decent manufacturer. Do not waste your money.