Yes.
http://wiki.arcadecontrols.com/wiki/Light_GunsRetroblast used to have a review, but that's been taken down - until a transition location shows up.
I have the LCD TopGuns and my friend has the Act Labs. It's difficult to gauge which are better. Both kind of suck. Neither he nor I have them connected regularly.
The topguns are very sensitive to calibration, which means I find myself re-calibrating for each person/stance/game.
The actlabs guns blink that white screen, so can't be used with games like Revolution X or Terminator.
Joseph Elwell.