Like it a lot.. especially in winter!
Re the switch.. Fiat have been a bit cheapskate & lumped it in with the rear screen. Which is not good, both screens on together draw a lot of power. & I've found that you don't need the front on as long as the rear. Ford's superior system uses separate switches.
Pondering a used 0.9 Lounge............yeah, don't go on about it.
I've got a heated screen on the Fiesta. It clears ice very quickly, a nice toy, but I could easily live without it.
The Ford screen has quite visible heating elements, quite annoying during the day, a real pain at night as oncoming headlights show every wire. Then, I absolutely hate it.
I've been in several VWs with heated screens and they have been almost invisible in daylight, but not tried at night. I've not seen a Fiat one.
So, my advice, before committing, sit inside and see if the wires annoy. If possible, do it when dark and see if they reflect.
Ive heard the VAG group one is no where near as effective taking 2-3 minutes to clear.
I've had it on my Land Rover Defender. It works very well. I also have it on my Cross now, but I have not used it yet. Luckily, winter is coming.
If you need it or not:
I would say it is very dependent on where you park your car.. Do you park much outide? Is it a cold freezing place in winter? (Like Norway)
Also a thought:
Gasoline engines heat up much more quickly than diesels do...