It's great. It's my everything. I drive it daily and love it dearly. The huge Siemens motor is butter over the entire rpm range but especially so down low. The ONLY gripe I have with the van is the limited range offered by it's small ~28kwh Johnson Controls battery pack.
Hence epic upgrade. An additional 46kwh of A123 prismatic cells.
My modules are 13s6p A123 20ah prismatic cells for 42.9v nominal and 48.1v fully charged. That voltage matches up well enough to a high power solar inverter, maybe 5kw. I'm going to be putting the modules in parallel for ....1080ah. Over 1000 amp-hours. It's going to be fantastic. That way the Johnson pack can charge from the A123 pack through the Brusa when the car is parked. Having a bunch of AC power onboard will be nice too for heating/minifridge/powertools/welding/whatever.
Having the car charge itself is admittedly a bit of a silly way to use such great cells but I cannot think of a better way to interface them. I think I'm going to run it like this until the Johnson pack just dies (hopefully a long time).
The number of local derpyvans just doubled. Read about the adventures of Mikuvan here: http://www.etotheipiplusone.net/?p=2711 .