sonyxperiageek: No, I didn't go with the wifi option so I can't comment on that. However, I did ask the installer about them and he mentioned the ones that did get it installed, sometimes they would disconnect and so it was a pain for him to have to keep taking the whole indoor unit off the racks just to get inside the unit to reset the wifi module. Now he just puts the wifi module outside the indoor unit, on the top for easier access.
May be something to think about if you do get it installed。
I’ve had a 5kw Cora for just over three years. The wifi module is very easy to get to, its got a space that it clips into just under the cover. I’ve never had any issues with wifi adaptor and rate it 100% reliable.
I pretty much don’t use the remote, just the app. Once it was fitted it has never needed to come out.
You need to make sure the heat pump indoor unit has good WiFi coverage, mine would be about 6 metres from the router and through a wall. Nothing special about my router just a 6 year old Huawei on fibre.