UPDATE: One year on (June 26, 2025), I still love this charger. The cable attaching the cap to the charger "nozzle" broke long ago, but other than that minor annoyance, this thing is great and highly recommended!
I have a 2012 Chevy Volt which can't draw more than 16 amps regardless of the charger level I choose, so this fact saved me money with a charge topping out at that level. Charging in 3 to 4 hours rather than over 11 is the main benefit for me here.
The charger seems to be very heavy duty, solid construction and works well with a plug converter (NEMA 14-50P to 6-20R/6-15R T-Blade Adapter). The included NEMA 5-15 adapter was nice since it enabled me to run this from standard 110 voltage until I had could have a 240-volt outlet installed by an electrician in anticipation of buying a fully modern EV in the future.
I'm unsure if this is related or just coincidence, but after beginning to use this I seemed to consistently get a few miles less of total estimated capacity from the car's battery. I haven't tested with the car's older included charger, so again I may be off base with this minor quibble.
Definitely recommended if your amperage requirements don't exceed that of standard U.S. household current!