What good is a an efficient battery or elaborate set-up options (s. Other reviews), when the tablet keeps crashing? And then at some point be unable to start ....! Returning, I could no longer, therefore gem. the instructions to the repair partners Amazon, Regensis, sent. That was over 2 weeks. Thanks to numerous mishaps in the execution (debt both through Amazon as well Regensis) I wait today. Without notification, when / if the tablet will be sent to me / was. I deeply regret the purchase and for much the same problem which is described here and in the Lenovo Forum, I do not recommend the purchase. Unprofessional repair processing then comes one at that. SUPPLEMENT: repairs processing is catastrophic! I have the tablet still do not get (13.5.)