Last year (the "before" picture) we had just plunked it down under an existing chimney the previous owner had installed. The house was drafty, etc etc. The new install is against an outside wall and we went for the outside air kit (OAK).
Last year without the OAK, there was a noticeable draft crawling across the floor towards the stove. This year we ran the stove without the OAK hooked up and there was a draft heading to the stove again, this time from a soon to be replaced door. Got the OAK connected outside, no drafts. I like it.
Make sure the ash pan seals properly in its slot. There is a tab at the back that needs to be almost horizontal to mate with the gasket in the front of the ash pan. Also, make sure the spin-y part of the ash grate seats flat down against the casting it sits on. Ours didn't, and we couldn't control the stove at first. The ash pan opening wasn't sealed and the grate leaked- we had a forge, not a stove. A little bending and grinding, voila.
Ours has the heat shield, we need it for clearance. Our stove store said the blower is a waste of time and money.
If you've got specific questions let me know.
Nat