Yes - we tried a couple of different awnings and they just didnt work.
We ordered the Thule G3 at the NEC Motorhome show after a really informative discussion with Rose Awnings. Not sure on the exact spec of ours, but I believe its a panel van specific type. The poles that go nearest the sides of the van are not straight, vertical poles - they follow the contour of the van somewhat.
I'm glad we took up the free install option. We booked into a very nice local campsite, three miles or so away from Rose and then left the van with them for the day. They are proper Thule dealers so were able to adjust the postion of the actual Omnistor. As standard the front end of the awning was too far back, meaning the support pole would prevent the door opening. The sizing and position means the side door easily fully opens and closes. Nothing seemed to phase them and they spent a good hour showing us how to assemble the awning and take it down. They even applied coloured stickers so we can instantly recognise which bit goes where!
As for setup time - its straight forward.
Extend awning as usual. Attach side rails which lock into the Omnistor 'tube' and then clamp onto the sides of the awning. Wind awning back slightly to tension and tighten clamps. Insert the rearpoles into the connectors on the side rails. Slide in side panels, then the front longer panel. Use the connection tubes to attach the sides to the front corners. Peg down (well - as you go really).
Two people can do it in 15-20 minutes. Its made much easier by investing in a selection of decent pegs! We pack a battery powered drill and a 'thor' hammer - these make light work of getting the pegs in which can be really time consuming. Oh yes, some steps. Its a tall van with a tall awning!
Structurally, its very strong. We got caught in 40mph+ winds and it was fine... much better than my nerves! When packed up it fits into two bags - one with all the poles. This is almost the same length as the rear storage from door to slide in panels in the 680. The second bag is shorter, fatter and heavier and takes the actual panels. Total weight, must be aroud 30kg.