As a HIGH volume investor, I had good experience with Polo until May.
They REALLY lags in support, it's basically not existing now.

Since I have LARGE NUMBER of BTC constantly trading on Polo, was a little worried after seeing these posts.

So I did a test withdraw with little over 10BTC, it went through flawlessly in just minutes.

I'm on advanced verification and using static IP address, test withdrawal is to a newly generated cold storage address.