Downstairs in my home the rooms have more expensive cut to fit darkening shades. Upstairs I have the Walmart ones. The Home Depot cut to fit ones are heavier def better quality. Upstairs tho the cheaper Walmart ones serve the purpose and when pulled down our bedrooms are dark. We've been keeping windows closed and shades pulled the last couple of days here in Southern, NH as we are experiencing the heat too. Altho I'm sure it's hotter in Boston. We have 1 ac in the den and have 2 high velocity fans DH bought on Woot to use in the Winter to circulate heat from the pellet stove. We turn those fans on in this heat to circulate the ac. We have 2 window ac for upstairs bedrooms, but haven't put them in yet. Upstairs in our Cape can be like an oven in this heat, but I notice a big difference with the shades drawn and fans on. We don't have shades on all of our windows, but we do have valances/curtains. We just opened our pool yesterday bcuz last weekend was so cold/rainy. Luckily the water is blue and we had it tested it's fine. Can't go in it yet as DH poured alot of bleach in. Hopefully in a few days we'll be in it tho.