Unreliable, don't turn up for collections.
Twice now, nobody turns up for my parcel and no explanation. You contact customer support and you get a preprogrammed reply: they'll try and collect 3 days in a row. But turning up in the first place is the problem. And at the end of the day they are cheap, but unreliable and the slowest delivery in the UK by about 2 or 3 days. So they end up dragging your own good reputation down to their level for the sake of saving about a pound.