I'll qualify my comment.
Done 3 Wren kitchens.
1 - all carcasses arrived, but had to supply own fitting hardware as they didn't arrive and was going to take a month to arrive.
2 - missing doors - took 2 months to resolve
3 - loads of missing doors and carcasses, ended up getting a refund
Absolutely nothing wrong with the quality of the units, but if everything doesn't arrive at once you could be in for a fight (in my experience)