Product as described and matched earlier devices. Has ESP controller and spot for programming headers easily available (5/5 would buy again). Has seal for cable but not for the case (some silicon might be a good idea).
I ordered two of these and was not disappointed in any possible way. Both of the devices are really good quality and design is (by my understanding of electronics) quite good and serviceable. Also if you're interested in to reprogramming / debugging the device it seems to be possible (spot for header). Currently I have 16 Sonoff devices and I'm happy with every single one of those so I started to check Sonoff products first. What I couldn't find from Sonoff is power meter remote socket in similar form to S20 with schuko (EU) plug so that's on my wish list from the company.