Purchased Shimo VPN client due to its claims. But found when connecting to one particular VPN server, the SSL is limited to CISCO and will not connect to an SSL certified Microsoft VPN Gateway. Problem is I have not found another option for Mac OSX, Apple appears to a little lacking when it comes to supporting secure VPN access, yes I know they support OpenVPN, that is not the point.
I've been wrestling with a VPN connection from my Mac(s) to Windows servers since Apple seriously cut back on connectivity options. Previously, my best work around was using a Parallels session or booting in BootCamp. However, Shimo offers a native Mac VPN client that works well. My one only limited comment would be that the interface is a little difficult to navigate to new users. However, once past that learning curve (which is not a big deal), it works. And continues to work with no additional issues. I recommend it.