I got mine setup yesterday.
My initial impressions are thus...
1) The signal itself is great. The LEDs are bright but not too bright. There's a bit of a glow if you look too closely, but from a few feet away they look perfect.
2) Trying to program the software that controls the signal is painful. Granted it's self inflicted because I'm using LCC, but still...
3) There's a massive difference between the 5 for $15 signals off eBay and $25/per from Atlas. I prefer Atlas ones, but my wallet prefers the cheap ones.
I used some of the 1.25mm JST connectors so that I can easily unplug the signal, and it made setting it up a snap. Relatively speaking.