Zheng's car is great (clean, well-tuned, lots of features) and he was happy to drop it off and pick it up from me at two different locations (for a fee). I would happily rent it again. One thing to note: there's a handicap-accessible handbrake and hand-accelerator attached to the steering wheel, accelerator, and brake. I found it made it a bit difficult to drive, so I asked Zheng if I could take it off, and he said no problem. Required a hex key, but it was easy enough.
Pickup and drop off was super easy. Zheng was very responsive and accommodating, his wife also was very sweet to borrowed her child's car seat to us with no extra charge. Overall great experience! Definitely will come back for more minivan rental needs. I give he and his wife 5+ star.