Hummingbird + Marketpress = issues?

Hi team!

Installed hummingbird onto one of my wordpress networks, all seems cool. However I had a lot of issues with caching/speed-up plugins and marketpress as they affected the sites ability to show latest stock and products and updates due to caching.

So far so good with hummingbird, however I wanted to check if you guys knew of any compatibility issues between the two? WIll hummingbird speed the sites on my network up without causing eCOmmerce issues and stock update (as an example) issues? (ie shows in stock as its cached but really its out of stock)

Also, does applying it to the global network admin filter down and improve the sites automatically? As I noticed there wasn't a full control panel in any of the sub-sites.

Thanks guys!