I went ahead last night a flashed it with Arduino and it's working just like an ESP-12E at the moment - just with the external antenna (very good signal btw - right around -67 dBm, normally I can only get -78 dBm in my office with the PCB ant option) and the extra 4 MB of space I'll never use. The appealing thing here is that I can reliably do OTA updates because of the extra space over the ESP-07 and have the ext ant, so for the moment, I'm very happy with it.
I went ahead last night a flashed it with Arduino and it's working just like an ESP-12E at the moment - just with the external antenna (very good signal btw - right around -67 dBm, normally I can only get -78 dBm in my office with the PCB ant option) and the extra 4 MB of space I'll never use. The appealing thing here is that I can reliably do OTA updates because of the extra space over the ESP-07 and have the ext ant, so for the moment, I'm very happy with it.