I got two of them last week, the xx59a, the HD model with SC slot. Having owned and loved several airsight SD's from the day they were released almost, I was very excited to get the HD and the memory card option.
Suffice to say Im EXTREMELY disappointed.
From what I can tell, the night vision is terrible, neigh useless, in stark contrast to the SD model which was amazing.
I say from what I can tell, because its quite the chore to actually get these things working, and seemingly impossible to keep them operational. Wireless is flaky at best, and wont accept PSKs that contain anything except numbers or letters from what I can tell. Once you get them working, wired or wireless, I find they often stroke out, I will get nothing but a small blue box on the video screen, the settings in the video menu are all gone and unchangeable. I havent figure out what combination of rebooting and power cycling actually fixes this yet but I can get them working again if I play with them enough. Also sometimes I just get the display saying "video" and nothing else.
From there the UI is okay but not as nice as the SD unit, and the motion detection is terrible, it goes off constantly (possibly because of the horrible quality of the night vision I dont know yet) and instead of 6 spaced pictures like the SD model, you get only 3, so its hard to catch anything from email.
Im sure some of this will be fixed eventually when they finally release new firmware, but once I can get a comparison of the night vision between two identically placed cameras and confirm my belief of its shortcomings I am going to return the both of these, as that is a necessary part of my use.