I have had my snooper S6R Neo for 6.5 months and yet to see a laser warning although I have passed plenty mobile sites.
Sitting bored on sat afternoon looking for a new phone (going for Nokia 6600) I read comments about the class 1 laser used for infared.
So as you have probably guessed out I went and sent a business card via IR towards the front of my car and LASER ALERT came up immediately.
So there you have it test it and prove it works.
I currently have the Nokia 6310i but would assume they all use the same frequency so all should work.