I recommend walking a few minutes over to the other Salad Days location (the original in Cumberland Terrace).
This one doesn't seem as familiar with the menu options and so sometimes they leave ingredients off that the other location adds (e.g. I've gotten the smoked salmon salad and it's just been lettuce, cucumbers and smoked salmon here whereas the other location adds peppers and capers). The portions are smaller here too. Still, it's a pretty healthy, quick and cheap lunch option and I wouldn't turn it down!
Agree with the tip about using Ritual (and I think they are on Grabb too). You can skip the line that way (but the line moves pretty fast).