Hey guys,
Whom of you is using the new admob, whom the old?
I´m using the old admob. I´m got mailed every 2 weeks from admob asking me to upgrade, but when the upgrading link didnt work, I couldnt do it. 2 months ago or so they stopped asking me to upgrade. Guess they accepted it 
Been using the new Admob for many months now. I have mostly had a fantastic experience with the upgrade.
My eCPMs have been so much better for some reason.
Only down side for me is that House Ads still don’t work (come on Google ffs).
If I were you I would at least consider upgrading soon. They are likely to depreciate the old Admob at some point.