So, finally got round to trying Zizzi out (twice in fact) this last week.
First time, myself and the mrs had a starter and a main and then had to leave hastily as just that took nearly 2 hours.
Thought it might have just been a bad service, and due to their catering for dietary requirements, went again a week later (Me, mrs, Brother and his mrs, and 2 kids)...
This time it took circa 3 hours to finish the meal - and that's with complaining about the wait and having the waitress chase up the kitchen staff. 2 kids were obviously worked up by the end of it, and was a pretty miserable experience.
The food is lovely, but these wait times for simplistic meal options are ridiculous (literally all of us had ordered pretty run of the mill pizza's)