i work on the corner of blackfriars road / webber street and the company i work for has an account there for our lunches.
we had used Riva in Borough high street when we were located in Marshalsea Rd
Pronto is leagues ahead. The staff are very friendly and now know them on first names basis, the food is always fresh daily, good choices, great prices with great coffees and breakfast available in the mornings.
I highly recommend a visit if you are within walking distance. due to their popularity i advise to go between 12-1 for hot food before it goes.