I've been a lurker here for about three weeks. I purchased a V1 second hand from a friend. It had the 3.619 firmware before the recent update to 3.824. I had a chance to drive about 250 miles today and here's my observations. I had no false alerts beyond what the old version had. Sensitivity is better on ka band. I'd estimate about 3 seconds more warning at a known speed trap. When the unit is programmed to eliminate the ka falsing protection(6-V) it doesn't false like the 3.619. Remained quiet in areas where the 3.619 version would false.
I encountered 3 ka band traps. Two were instant on and the trap I described above was constant. The detector gave supurb warning on both. So far I'm very pleased with the $55 upgrade.