I got the half rounds in and installed on the weekend Dave. Not a fan at this point. They have a very rough texture. I kept my old strings and will likely put the old ones back on if I can't get used to these. I installed them on my favorite guitar, so I will have to make my mind up soon.
I have flatwounds on other guitars and they feel great, very smooth and mellow. These feel like sand paper.
The ones I installed are D'Addario EHR310s.