I have a eurekazone track system, and I like it a lot.
I do, however, sometimes think I might be happier with a track saw that keeps the same line for angle cuts. I can make angle cuts, bit they are less convenient to line up.
The dust deputy is totally worth it and works very well. I've filled my dust reservoir a few times already and haven't had to change my vac filter. The vac reservoir pretty much stays empty, and the filter stays clean.