They look smart they do
Does it have varying modes of regen, or is it just off and on?
How does it list your consumption, miles per Kw/H?
So what mileage are you getting and what is the WLTP? Mine is pretty normal I think, but by normal that's about a 20% loss in winter (can even be 30% on bad days/ trips) and 10% in summer. It's hard to hit the WLTP figure mind, and I think I've only gone over this once.
Mine can get about as low as 2 miles per kw/H when I'm caning it everywhere, but for an 80kw battery that's only 160 miles, from a WLTP of 240, but on some trips in summer it's up to 3.8 mp kw/H, and most of the time around 3 m p kw/H.
To be fair mind, I don't think they should only be allowed to quote WLTP figures, they should have to give examples at different speeds and different conditions.
You'll be fine once you get your home charger, it's a game changer. If you can, one thing which does help is pre heating the car and seats before you get in it, when it's plugged in to the charger, most of them can do this. It saves running the battery down, and obv means you'll never have to de ice a car again, or get in a cold car, small perks.