Does anyone here have experience with the chroma key portion of this package? If so, does it give better results than Vegas?

Here's a quote from John Rofrano:

The Chroma keyer in Boris Continuum Complete 7 is one of the best. You can buy it separately as a Continuum Unit if you can't afford the whole BCC7 suite. Download the trial and check it out. If you can't afford the Boris Chroma Keyer, the next best for Vegas Pro is the one in NewBlue FX Video Essentials II. The entire VEII set of plug-ins are great so you are getting a lot more than just a chroma keyer.

The chroma key plug-in in Vegas is 10 year old technology and it's about as basic as it gets. It'll do the job if you light things well and control spill. I would try and use it first before going out and buying something else. Only buy something if you need it.

I've used the NewBlue CK, it's really the best low-cost chromakey for Vegas.

Better than the native Vegas keyer, it has good good key color processing, matte shrink, matte softness. It does have spill suppression, not as good as its other features. In the OFX version for V10, all parameters are individually keyframeable.

One of these days I might spend the money for BCC. I'd imagine it's going to get stable on v10, for me it wasn't, so, I wasn't encouraged to spend the money after demoing it. It does have outstanding spill suppression, as well as good everything else. I understand that many users have found it stable on v10.

I'm not one for gimmicky efx, in general, but I have used the lens correction, noise reducer, and rack focus fx in the Video Effects 2 collection - they're fine and useful.

As Edward said, both BCC and NewBlue have demos that will tell the story...