I have a Combo 1.3cdti 55 plate. It NASA pure feedom upright system fitted which works brilliantly. Also have trad gear,one hose reel (only me) and it pulls really well, no problems at all. It does about 92miles on 10 litres of diesel. It's great to work on your own but if I'd gone for a transit connect LWB two people could have worked from a 500 litre tank and a full load with 100kg to spare (almost 1000kg payload compared to combo 825).
But if your on your own the combo is great.
Ps. I find the side door usefull