I'm gobsmacked

, I've just had it on heating mode, conditions are 22 degrees inside and about 10 degrees outside.
I wacked it on full heat and the indoor unit is.
And the outdoor unit which was blowing stronger than earlier but still quiet.
I asked my son in law to stand in front of the indoor unit and he said it feels like Miami.
Measured power usage only around 900W as in the spec.
I feel enhanced shoulder months comfort and efficiency, I can see me fitting a couple more of these units in the future.
I've now set it to 23 degrees and its ticking along almost silently at only 600w but its still chucking out tons of heat, followed a few minutes later to go into standby.
Sub £600 a pop including delivery and these are attractive units, very quiet, inverter types, Panasonic compressor, remote control and built in WiFi for smartphone control. And yet its circa £10k for an air to water air source heatpump ?
The only things extra I bought or needed are,
Vacuum kit and gauges, £80 on ebay, a one off purchase, no matter how many units I install.
Adapter for vacuum kit, £8 on Amazon, plus the optional £5 next day delivery, again a one off.
68mm diamond core drill, £20 off ebay, again a one off.
4 x Rubber blocks for feet £12, honestly didn't need them, practically no vibration from unit, could have screwed it directly to the timber post.
Trex duct tape, £8, only used half of it.
Drainpipe and fittings, £20.
Leak detection spray, £6, but could have used soapy water.
Paving blocks, already had.
Timber post cut offs and wood preserver, already had.
Stainless steel screws, washers and cable ties, already had.
Electrical, already have spare MCBs in consumer unit and plenty of cable, it even comes with a 13amp plug because its low enough power to plug into an existing ringmain socket.