yes.
it's stayed above 30 degrees in this room for weeks, even as the temp outside falls to 18, 19. we've had a couple of cool days and the temp in here has stayed put. it's great. i've found it helpful to run candles in the evening, but i don't have the heat on. it's just trapped in here.
the next phase is the aluminum, but i'm not sure i need it in the summer. i'll need it in the winter...
i'm going to clean in here and install a few things (shelves, mirror) while i'm at it. it will look closer to being done.