Years ago it was called Mayfield Kennels. Yes I brought my last dog off them (Shetland Sheep Dog) I got KC papers with him did get a guarantee to but cant remember how long for. I never had any problems with him and he lived to a good old age of 16 weeks.
Before I got Poppy I did go to Dogs4us to have a look at the puppies I fell in love with them all

It is like you said loads of glass doors with lots of different breeds of puppies.
I didn't buy one off them this time as I wanted to go to a breeder so I could see the mother and Father.
They were selling Shih Tzu for £575.