I’ll be driving one for the next couple of days. My experience fast charging so far has mirrored some others - including our first experience last year - where I’m only pulling 75 or so kW of the advertised 150 capability at EA stations. And that’s with the battery more than 50-percent depleted. With Teslas, Supercharging has always just worked, and at mostly high speeds, with the exception of being on the same charger as someone else or the normal slowdown while approaching fuller capacity. This is not unique to the Mustang. It seems hard to pull big speeds on most other CCS cars too - ID.4 a recent example. I’d like to try a non-EA charger and see if there’s a difference. There’s a Harley dealer nearby with CCS.