I wish to add some stuff: I have driven this chair for 4 weeks (while my main chair was being repaired) both in the Austrian Alps (Tyrol) and in Vienna (a fairly flat town).
- It was supplied with a huge off board charger with no means to transport it on the WC. The need to return to the charger decreases range.
- steering is only for grandmas.
- the large casters are indeed a huge bonus
- The OEM tires only have minimal grip; I found it seriously dangerous on a level wet surface. Decending slops can be very dangerous (slidding). Has sufficient power and grip ascending slops though.
- the anti-tip wheels are mounted far too low. They can suspend the rear (drive) wheel in mid air when decending a curb.
- There is a high probability that you get stuck then attempting to drive over "cable bridges" (is that the correct term?) as the rear wheels do not have sufficient grip to drive over them. (In such a case, the cable bridge is between the casters and the rear drive wheel.)
No comment on range as I only used it for short (2 km max.) trips. Also I never took the chair apart for transportant (A claimed advantage stated by the producer)
Conclusion: Extremly good loooking chair, large front casters are very usefull. However, as an outdoor chair I could only recommend it as a spare chair.
P.S.: Here a picture of a very small "cable bridge":
http://www.gifas.at/kabelbruecken/gross ... ruecke.htm