I've been using the Saleae Logic 8 and Logic Pro 16, and I don't want to knock them, overall they're not bad, the software is really nice, but for me, the continual downgrade in sampling rate due to USB bus contention, has just lead to endless frustration.
Finally I decided enough is enough, and it's time for an upgrade.
The Digital Discovery seemed like good bang for the buck, and with a substantial DDR3 buffer memory, it seems like I should not have the same issues I was having with the Saleae analizers.
So all I've done so far is to just fire up WaveForms and probed the logic pins on an RS-485 driver on one of my production MODBUS gateways, and started sending it some traffic, and there we go, I'm up and running. Nice!
So I'll be digging into the WaveForms scripting with the aim of developing a custom protocol analyzer for an RS-485 "token bus" protocol I've been developing. Hopefully that will help me to analyze the performance and in those debugging situations.
In any case, so far, I'm pleased, it's looking very nice!