I've had a Broadlink mini for years and wrote a big blog post about them when I got mine. IMHO it works brilliantly and it's $20ish, but it's no $200 unit.
If you want all the functionality as discussed above them a Sensibo is the smart option. If you just want something to turn the heatpump on by scheduled timer or of/off remotely the Broadlink is a bargain.
Have you got a link to the blog post?