The setup procedure for wifi connectivity is overly complex and error prone. BTW, I have a BS and MS degree in computer science and have worked in telecommunications for 35 years.
The T6 works great for us at our second home. We can set the temperature as we drive towards the house (2 1/2 hour trip) and it's either cozy or cool (as the temperature dictates) as we set it for when we walk in. Nice change for us.