Could you tell us why you would not recommend it?
I prefer not to post negative feedback about companies. When last I checked their offering is not something I can associate W3TC with.
Would you recommend a particular setup?
Cotendo currently has a strong product line.
You must make sure that W3TC is configured to use the “Mirror” method, enable it after specifying either the hostname cotentdo provided or a custom one if you’ve properly configured one. And then empty your page cache settings. View your page’s HTML source code to see that the CDN hostname is used where appropriate. If your site layout breaks, then there’s a misconfiguration at cotendo or in your settings. So you can try W3TC’s preview mode if you wish.
It’s also important to make sure your contendo configuration is set to ignore cookies otherwise they will not cache files and not accelerate your site as a result.