well the gun goes out of calibratino if you step forward or backwards, don't know if lightguns ever did that, but so far its the only issue I have come across with aimtraks.
but as for you saying 'If you expect to look down the barrel and use the gun sight's you're gonna be a little disappointed.'
i must disagree, you make it sound like the aimtraks are like wii remotes, which they aren't, wii remotes are aweful to play light gun games, they have absolutely no correclation to real world gun barrel-to-screen line of sight, but aimtraks truly do have this, i can play a 40 minute game of time crisis 3 purely aiming down the sights of the barrel and its completely accurate, I would know if it wasn't as i would have thrown them in the bin and looked into CRTs, thankfully they worked quite well.