I will say that I've never really relied on a detector for mobile photo radar, down to two factors: a) Multanova is a pain in the arse, and b) a van or SUV parked on the side of the road is a dead giveaway for me.
Continuing on the subject of the Antilaser Priority... I'm tempted... and it's a Canadian site!
http://www.antilaser.ca/al-priority/