Preston Fan here,
He is a good solid keeper, I personally bought 3 of his signed shirts last season.
He had Storey and Lindsay in front of him and that is always a recipe for disaster.
He's a great person, does a lot for out reach in the community when given the opportunity and he is a great character to have around the youth players. He was unfit when PH first took over and played ok, last year he played a lot better and was notably fitter.
If you have a solid defence, Dai will give your team some confidence and looking at the current squad he is easily just as capable as your current injured number 1.
You are lucky to have him, he doesn't have huge demands and brings a lot to the squad.
Like any footballer, he needs to be playing to improve form so give him a chance when he plays.
All the best for the rest of the season.