The idea of purchasing groceries online isn't new, but several limitations have kept it from reaching mainstream audiences. Nevertheless progress is being made by the likes of FreshDirect, AmazonFresh, Instacart and dozens others operating in a handful of cities or focusing on a particular niche.

Meanwhile, online food ordering from restaurants has already grown into a multi-billion dollar business (GrubHub made its IPO today), but still represents a tiny fraction next to offline takeaway or delivery. In both cases the focus is mainly on convenience rather than low prices – always up-to-date options and no dealing with crowds or phone calls with noisy restaurants.

This week we want to know: do you regularly purchase groceries or order food online? Which services do you use and what has your experience been like?