Yeah, the differences between 6 and SE Plus are amazing. I've been with Lavasoft for about 3 years now and I've never been led astray and none of the instances they found were mistaken false positives.

The SE Plus version allows for plugin usage as well as being able to customize it through configuration whereas the free version doesn't. I have the paid version as well as Reghance, their registry editing utility, which is so much better.