They absolutely ALL suck. I don’t know why anybody bothers with them. About the best they seem to do is lower the rate at which your battery drains. Many can’t even maintain your current battery charge level never mind increase it.
As for the fancy-shmansy add-on offered by TWARPS or whatever they’re called, my buying one of those would just remind me too much of my early days of Tesla ownership. Our first Tesla, a 2017-build Model S, was lacking in so many simple convenience features, many of which could be found in a Kia Rio, that every week, I was searching feverishly online for some after-market gew-gaw that would make the Model S just a little more occupant-friendly - cupholders, chargers, phone mounts, coat hooks, ersatz-grab handles, frunk and trunk organisers, whatever…it was just dumb, to have to spend even more money on crap that the car should have already come with.
After that experience with our Model S and later our Model Xs, I said to myself, “no more”. I resolved to hold out for an EV that already came with everything I wanted and needed. My Air GT as is, comes closest to that.
Sorry. Something about this discussion must have set me off. Rant over.