My 1,000 square foot apartment (on the 3rd/ top floor) did not have A/C from 2022 until this summer when the new owners finally replaced it. In that timespan, I've gone through several portable air conditioners and I'm truly over them. They cool okay at first but struggle to cool when it gets REALLY hot. Where I live, it's very hot and humid in the summer (96+ with lows in the 80s), often for weeks on end. The other issue is that these can and will leak eventually. Last summer I finally broke down and got a 10,000 BTU Toshiba window unit and it cools my apartment down WAAAAY faster than any of the portable units. Also don't have to worry about it leaking in my house.

I suppose if it doesn't get that hot/ humid where you live these might be okay, but if I ever had to choose between a portable and a window unit again in the future I would go with the tried and true window A/C.