Bought 1 for each kid for fall 2020 school year.  One kid's didn't make it 30 days before had to be returned- a lemon. Glitchy, battery wouldn't hold/charge, freq disconnects/freezing.The 2nd kid's seemed to work just fine.  That's why I thought the 1st was just a lemon.  Unfortuantely, now hers is completely useless.  She simply opened it up one day, and the connection  at the hinge just broke.  wasn't dropped, pried, mishandled in any way.  I saw it myself- i was literally sitting on the table, flat.  So she managed to use it as long as she held the monitor in place.  By the end of the night the 2nd hinge came undone.  the monitor is completely disconnected.  Too bad this isn't one of those laptop/tablets that can be taken apart.$900 down the drain and it didn't last a semester.  SO MAD!!!!!!  Not able to return it.Other than that, they're great.