Anyone using CN2 in China? Is it worth the extra cost? Are your VPNs more stable?

We have a location in China where we use an ipsec VPN as primary connectivity to locations in the states. The current ISP there is one step up from consumer Internet, and seems to work well for accessing Chinese web sites. And, for a while, our VPN performance was good as well.

However, recently our VPN latency has gone from a steady 200ms to ranging from 300ms to 400ms and has stopped working altogether to one US location (since business VPNs are supposed to be allowed, we've notified the local ISP about the blocked VPN, but so far, have not heard anything).

We are also testing Office365 and seeing some performance issues via their existing ISP.

We've been recommended to switch the China Internet to CN2, but it is expensive, and typically requires a three year commitment. Is anyone using CN2 that can vouch for better performance (and stable VPNs) over a local Chinese ISP?