Me and my friends have been ordering from John's for delivery the past few weeks, so this review is based on delivery and not the actual place. I seem to remember going there in person a few years ago and it's like a dark cave with zero ambiance. I do like the stone work outside though!
So this pizza is really good in my mind. We just get very basic kinds like veggie deluxe or a mixture of favourites (pepperoni, green pepper, mushroom) and they all taste delicious. I like the crust and that's rare for me when it comes to pizza. It's very thin but soft so when you get to the end it's like a continuation of the pizza. Rather than being discarded back into the pizza box, it ends up in my belly.
I've never actually made the call to John's so I can't say how easy/difficult it is to get an order through, but the pizza has always arrived quickly (I don't think anyone orders from them) and tastes great.