Outstanding exterior and interior design. This is (finally) a true Citroën. I dislike the C5, so after owning ZX, BX, XM and Xantia I just had to skip the C5 and buy a Peugeot instead. However, the C4 hatchback had me in love again. But since that was too small for family use, I decided to wait for the Picasso. And the wait was truly worth it.
This car has pretty much the same extremely comfortable yet responsive road handling as in it's older gas/hydraulic sisters. A bit too easy on the steering perhaps, but you get used to it.
The new EMG6 gearbox is very good. Quick and smooth changes, unlike the older "Sensodrive" boxes found in smaller and older Citroëns like C2 and 3.
Plenty of stowage space, you can store stuff for years in this car and never find it again, but the car will still be as tidy and clean as it was when new. Seating arrangement is the best I've ever seen in any MPV.
Lot's of gadgets, which means you need to spend hours reading the instruction book to fully appreciate everything. The car takes care of everything for you. Just start it and go. Exterior lights turn on automatically, and interior lighting as well if it's needed. When you tap the gas pedal, the parking brake releases automatically. If it's raining the wipers take care of the rain. If you're driving in a polluted environment, the parking sensors in the front "smells" the pollution and block the air intake for you. It needs some thinking yes, but once you get a hang of it all, every other car on the road seems like Fred Flintstone's.