It is slow with the stock EVSE - the manual says ~21 hours to go from 0-100%, and since we have only ever gotten it down to ~12 miles, I can only estimate that this is probably accurate. We are typically charging for 10-12 hours and usually getting it up to 100%.
Speaking of EVSE's, my brother received his JuiceBox Premium yesterday:
It is a bit taller than I thought it would be - it is sitting on his lap, and he is a 6'-6" ~265 pound guy. He says it looks very well made - it is all metal. I thought it was plastic, so that is a relief. The black cord is a 50A six foot RV plug, and the orange is a 32A twenty five foot J1772 output. (The 50A J1772 would have cost another $75 or so, and weighed an additional 3 pounds.)
I have no idea what the brown thing is that is taped onto the unit, but it covering the digital display window.