"The system entered full scale engineering phase launched in March 2005 and is scheduled to be ready for service entry with IDF Merkava Mk 4 tanks by 2007."
http://www.defense-update.com/featur...eature-aps.htm
It's pretty logical. There's a radar system that responds to heat and triggers an anti-missile device.
Their track record with getting these sci fi toys into the battle field is pretty good. The US airforce used their infrared targeting device for the Zarqawi hit.
In the past month alone there were 140 missile attacks out of Gaza so they're pretty motivated.