Again, their quality control is just plain bad. But their firmware support is overall pretty good. There have been a couple of mistakes here and there. If anyone still has 1.23 on their units, I'd really never connect it to the app ever again. Just uninstall it and don't look back. 1.25 is fine, it pretty much works the same as 1.23 with the added (and unnecessary) graph function. If the broken plastic floating around in your unit is black, it's probably from the inductor. That's been reported a couple of times. The ringing in the handles seems to vary. Some units do it, some don't. Some people have reported that a FW update fixed it, but those were older FWs before 1.23. If yours is doing it on 1.24, it will probably still do it on 1.25. The only change between the two is fixing the messed up icons. No one has yet to definitively identify the cause. I got lucky, my unit was fairly well soldered, clean inside, no screen issues, nothing rattling around, and no ringing handle. I'll eventually replace the cheap Chinese electrolytics on the power supply with Nichicons, and call it done. For the money, these are amazing stations. Too bad it's a bit of a crap shoot with QC. Honestly, I'm kind of surprised Dave doesn't get involved with the company. With all the work he's done with the multimeters, a good soldering station seems like a no-brainer.