I did the same online research as I am sure we all do and was going to go the whole hog for a a CyberQ but the price was a little prohibitive (for my back garden Q anyway). I looked at the IQ110 but something about the long pipe from the fan to the vent put me off - prob just an aesthetics thing but seemed odd not to just have the fan pumping directly into the vent.
The mains power is a bonus but I run my WSM in sun, rain and even snow so wasn't sure that I wanted mains power over a water proofed battery caddie (plastic bag and some elastic bands

) which I put some golf hand warmers around when it was snowing.
I'm no purist but like the idea that I am doing most of the temp control myself so just wanted something to allow me the few hours sleep that I get a night with 3 young kids. I now just use the PartyQ to get it all started, then maintain the temp using the vents and from about midnight start the PartyQ up again to keep the temp through the night - then back to the vents as the morning warms up.
I did a couple of racks of beef rib last Friday for 20 hours using the above approach and didn't have to change out the batteries once.
I have used it continuously when I first got it and the batteries would die some time in the middle of the night so reverted to the above method and seems to work for me.
Also found that it blows a lot of ash around when the fan is constantly running rather then just relying on thermals.
I guess it depends on how you want to use it - we are not blessed with a great climate and so for long cooks 4xAA batteries will need to be changed out a few times if you rely on the PartyQ alone.