Most people seem to report a good experience with the $10 original Saleae Logic clones and sigrok/pulseview. I don't have experience with Zadig, but I thought it was supposed to be pretty close to plug-n-play. Or maybe config once then plug-n-play.
I for one have had good experiences with a DSLogic clone I bought from eBay a while back for about $80. I use the DSView software, which is based on pulseview (therefore GPL'ed and ethical to use with the clone). sigrok/pulseview is supposed to work with it as well, but I haven't tried it (or if I did it was long enough ago that I don't remember).
I got the DSLogic because it's rated to handle a large enough voltage range for +/-12V RS232 signals.
I also have an original Saleae Logic from when they first came out, and the software for it is great. DSView is also very nice. Pulseview looks very nice as well from all the demos I've seen on youtube, etc. But when I get a logic analyzer nowadays I get the DSLogic clone and DSView.