The driver and the service itself were great - no complaints there. What was disappointing was that AnyVan, despite telling us that we could edit the details of our load until a certain point before the pick-up time, charged us a huge and entirely unfair surcharge. None of the customer service reps was able to explain this, and it remains unclear whether there was simply a huge penalty or whether it was the change in the load that caused the price to surge (and in fact double). The size of the load did not really change, not did the load time - but AnyVan's algorithms came to a very different conclusion. Effectively, we switched from a few large boxes to a larger number of small boxes, so this may even have made loading easier.
What I am particularly disappointed by is that the problem only became apparent at a point when we were in no position to look for an alternative provider. Combined with the poor customer service the whole thing felt like a deliberate way of putting the customer in a tight spot with misleading device and then ripping them off when they have no option of backing out of the transaction. The follow-up customer service experience was fairly disappointing, too, and I never really got the feeling that AnyVan had understood how badly they had got it wrong, and how unethical their behaviour is.
I will never use AnyVan again, and I will continue to advise anyone I talk to against using them.