Playing all of tonight it seems that if you like Blops you'll like this, if you prefer the atrocity that was MW3 then you'll probably go back to it within a week.
Just to mention, so you don't get surprised by it, it seems that a lot of killstreaks don't disappear unless they get destroyed. The Guardian, the Sentry Gun and the ARG (a little tank thing that roams around the map machine gunning everything) seem to just stay on the field forever. In one match both my ARG and Sentry got 16 flag defends between them, and the best part is you can remote control them at any moment, and exiting the remote control doesn't destroy them.
Like an EMP grenade will pretty much put a stop to this but no one uses them.