I've had my car a good long time now, since November in fact and been a "lurker" in here but want to contribute more
In terms of the pre-entry - from what I've seen it simply choose whatever your last AC settings are when it enables itself, so if you have your car set to 21 it will come on and go to 21 for you. So in theory if you wanted to you could have your car cool in the winter and hotter in the summer if you really (really) wanted to - yet just pre-acclimatises your car based on current settings, pre-heat is a misnomer because you can use it in the summer to chill your car also if you have temps set low from the previous trip say... it works really well.
The only thing I bloody wish it would do is have a schedule, as in Monday-Friday, have it on, Sat-Sun, off. Also wish it could remember it's settings, it forgets them the second you have set, so you need to remember to "reset" it each nite from the app. That wouldn't normally be a problem, but if I park in a particular way on my drive the signal is terrible and I can't sometimes contact it from Internet - so being able to pre-programme it, and have named schedules would be amazing - possibly future software update...!