I don't think that H&M heels are too comfortable.
Cheap shoes usually aren't.
I dont know about H&M but I live in Zara 4"+ heels. NYer here who walks 4-5 miles a day in these. Zara makes the Best shoesWe often see a lot of style bloggers wearing Zara or H&M shoes but the truth is they style these things for a shoot and usually then change into flats right after! So I'm also curious to know if H&M shoes ~generally~ wear comfortably. (: