I've been a couple of times in the past year - food, price, waiting time and service all reasonable.
As the name suggests the food and set up is cafe style. Everything's vegetarian and mostly vegan. They've a mixture of communal and individual tables, with a small outside space. On our most recent visit we had a couple of vegan pizzas, which including drinks came to about £20:
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I'll both return and happily recommend it - whether you're in the area already or fancy a change from the usual Z1 dross.
I love the Gallery Cafe but I've never tried their pizza, looks good.