"The players we have signed have done well, integrated well too," he told the WBA website.
"Ben is very solid. He played very well in his first game against Bristol and made some good saves. He's demanding of the back-four, very experienced from being at Manchester United and his time at Birmingham - and he will do well here.
"He's a good guy, he's been here almost two weeks but it feels like longer than that. He's settled in very well with the team. It feels good to have him around.
"He kept quite a few clean sheets last year. I enjoyed playing with Scott Carson but now he's gone, Ben is here, and he's impressed us a lot.
"The record he had last year of nine clean sheets was very good.
"I look forward to playing with him and the more we do the better understanding we will have."