Similar take here actually. In 2011 i bought two 6x4 sheds from B&Q for delivery.
They turned up fine and dandy however the pressure treated timber left something to be desired - within a month one was growing fungii of sorts despite the 10 year guarantee.
They did refund me on it to be fair and said dispose / keep / treat at will but i was slightly disgruntled at the time. Incidentally i ended up giving the other one away when we moved and still have the free one now lol.
I need a new signature... i'm bored of the old one!