Ive tried the hik and the ring and the cheap Chinese one found on ebay for £50.
Non of them worked as advertised, I still have the Chinese one, it works for my purposes, rings, records on my driods, but it doesnt call my phone (the app drains my smartphone battery far too much) . All of them have poor connection and delays when the doorbells are connected, they are nothing like the TV adverts even when you are in the house on the same WiFi connection. The motion detect alarm goes off for no apparent reason even on the lowest setting.