We use Aryaka to connect our AWS Singapore and AWS China (Beijing) sites and use the Aryaka Virtual Office services in Singapore as well.
- Relatively easily to implement
- Support is very inconsistent, no real trouble-ticketing system when you have issues
- Very expensive for what you get
- Not much advance notification for maintenance events
- Unclear if Aryaka connectivity into China meets Chinese M.I.I.T. laws
It integrates nicely with AWS (in regions other than China). The provisioning support is pretty good.