Just got these in today. It's been awhile since I had the Monoprice, but my initial impression is I like these better.
The pads aren't great. I swapped them for some Shure SRH840 pads I had lying around and it improved the comfort a lot. These are a tad loose... the HM5 pads I have would probably work a little better.
They're not going to challenge my $200 headphones, but for $20 these are fantastic!