Default [Q] How to start?

Hi,

I have a few questions which you experts are the best to answer:

When I get my OPOs in the coming week, what are the 1st things that I should check, look for and do:

They are already running CM 11S.

1. How to check whether the flashing was correct or do I need to re-flash?

2. Do I need to root it, if yes how, pros of it?

3. Any better OS than CM 11S?

4. Are there variant versions of CM 11S?

5. What exactly does one imply by battery cycles?

Hoping to hear from you,

Shall keep you posted about it's performance and post it's pics.

Thanks.