I bought the Sous Vide Chef 2 a few weeks ago and so far I'm quite happy. It survived both my short <2h attempts and one long 36h run. I think the accuracy is quite good, at least as good as my previous self build rig which uses a PT100, so it's probably really in the +/- 0.5°C error range. The build quality is ok, the plastic looks more cheap in reality than on the photos and the clearance between both plastic housing parts is ok, but I still have a few concerns about condensation. I have not yet opened it to clean it, but I've read on other forums that it's too cramped in the casing to clean properly. One thing which is more annoying than anything else is that it has a water outlet at the backside of the submerged part, which atleast in my container snuggles tightly with the container wall and this apparently can lead to vibration which is quite loud and annoying. I'll need to try a few other container to see if I can optimize that. Currently my verdict is, that I would buy it again.