Yes, I've used it in a commercial product with 10000+ deployments. It was the only chip with BLE and WiFi, so there was no other option at the time. If the requirements were different, I would use something from Nordic Semiconductors [0] or some ARMv8 chip.
The hardware itself is fine, but the biggest pain was getting stable WiFi and BLE connections simultaneously, because of only one antenna/radio. RAM was also a problem, it would be great to have at least 512kb. The SDK from Espressif is sometimes a little bit weird, but usable and bugs are fixed quickly. The build system is ok, nothing special.
The hardware itself is fine, but the biggest pain was getting stable WiFi and BLE connections simultaneously, because of only one antenna/radio. RAM was also a problem, it would be great to have at least 512kb. The SDK from Espressif is sometimes a little bit weird, but usable and bugs are fixed quickly. The build system is ok, nothing special.
[0] https://www.nordicsemi.com/