Yes , I have the VKFX and it is one of the most satisfying purchases I have ever made from the Cakewalk store.
If you can spring for the whole Suite I would recommend that…you will get much more flexibility and usability .
The Suite runs standalone if you want to use it that way …and the Suite can be used in other DAW's
Many of the included presets and device chains within the plug sound great ( to me ) so dialing up a good starting and end point is pretty easy.
For SONAR the individual modules are tightly integrated w the Pro Channel so you can place them anywhere you want in the signal chain within the Pro Channel .
The VKFX 's sound has a lot of character . I love the whole Suite combination thing and I use it all the time .
Kenny