I'm lucky enough to work at a place that caters food from Merci Mon Ami for most of our client meetings - which means I've had the chance to try most of the sandwiches and wraps. Every single one of them has been excellent, vegetarian and not. The salad is always fresh, the dressing always delicious. The bread for the sandwiches seems to be baked in-house: it's always fresh and crusty.
I've eaten here on my own dime a zillion times, too, just because it's so close to work.
I'll admit my favourite treat from Merci Mon Ami is their hamburger - it has all the flavour of a home made burger (*very* juicy), and the toppings let you personalize it as you like. And, very occasionally, I'll splurge for a glass of wine with that burger - a great way to mellow out in the middle of a stressful day.