Libra H20 - I want to like it but..

it just feezes frequently,
randomly reboots
doesn't come out of sleep.

I mean, it's just been horrible. I looked into some database fix and it worked, for a while. Now freezing again.

I load epubs from Calibre.

I just saw perhaps I should try convert them to kepub format?

Help me before it goes in the bin. I don't want to shell out for another reader if this one can be made...forced..into well just being stable.

Thanks