I have no experience with the Alaska Direct Vent. It is my understanding that type can only be mounted on a bottom vent stove.
I am using the SWG power vent on my Alaska Kast Console. It works great and has the safety advantage of providing a negative pressure (draft) in the stove pipe which makes any slight leaks drastically less critical. The SWG has one weakness, it has a small aluminum cooling fan for the motor on the outside, this fan keeps the motor cool. Over time stove gases are sucked up by this little cooling motor and corrodes the fan blades off thus causing a failure of the power vent motor. The solution is to spray a little WD40 or similar up inside the fan once a month from outside.
As far as cleaning, I vacuum the inside of the stove once a month as jpen suggested and take the power vent cover off once a year and give it a good vacuuming. I also occasionally tap the pipe above the stove with my hand while the power vent is running to suck up any loose fly ash.
Best wishes for a successful coal burning experience in your first season.