Actually, there is something wrong with Postman. It didn't affect the Chrome version but the standalone has a serious bug where it just completely ignores your hosts file. There's been a Github issue for it for over a year but they haven't bothered to fix it.
Personally, I prefer Postman but because of that bug it's basically useless for me.
Sorry about that issue. We have been working on the migration from the Chrome app to the Electron based app for a while. The final set of changes in the runtime went through in v5.4 (collection level auth, variables, scripts etc.). Changes closer to the network layer will start trickling in through soon. It seems like a long time for a bug, but we have been releasing version updates almost every 2-3 weeks. :)
Personally, I prefer Postman but because of that bug it's basically useless for me.