Nice native experience. No subscriptions.
It's straightforward, and (most importantly for me) works seamlessly through a corporate proxy. I also like it's approach for having a hierarchical tree of saved queries, which can be easily exported and traded between developers (I'm sure there are superior, centralised solutions but this works well in our team).
I've read some of his books - Amusing ourselves to death and Technopoly - which I would recommend to anyone.
The first is regarding the effect different mediums of communication have on the messages we transmit in them. How do the messages you transmit with say smoke-signal, writing and tv differ?
The second talks about technology for technology sake, rather than a means to an end. Increasingly relevant today.
I used to use Insomnia, but switched to Postman and never looked back.
I gave Paw a try and it was pretty neat, but not as easy to use as Postman.
Postman's code generation is also a neat feature.