$300, delivery right to your door. I've had zero issues with mine.
Although NEMA 6-50 is not listed.
Need to swap plugs.
I believe they will put on any plug you want, at least that was the way when I ordered mine.
I ended up with a L6-30 plug to match my garage outlet and use outlet adapters I've made to go to other outlet types.
Note because mine came with a L6-30 plug they restricted my top charging current to 30a(although my Leaf tops out at 27.5a) if you ordered it with say a 14-50 plug they would give you a 32a option which is the max for the supplied metric J1772 cable.
IMO a big advantage to something like the Zen charger is its adjustable and also works on 120v with outlet adapters, Clipper Creek while a very good EVSE is only L2 and non user adjustable(of course it dials down if the car requests it).