I went to &Co. on a Saturday in November for my birthday - we had an 8:00pm dinner reservation so that we could stay for dancing afterwards.
A few days before my reservation I had visited the place to scope it out since I had never been, and the hostess was nice enough to give me the grand tour of the entire place. Dealing with the staff when making the reservation (also when confirming and making changes to the reservation) was a pleasant experience. Everyone I spoke with was very accommodating and helpful.
The place itself is pretty nice, the decor is chic and modern as you would expect. When we showed up for our reservation we were given a large, high-top table in the centre of the dance floor which was pretty cool. It was a great vantage point to scope out the rest of the crowd, and it was the only table on the ground floor that is bolted down (which means they didn't take this table away when the dj/dancing started so we had it for the entire evening!). My only 2 complaints about the place itself is (i) there were no bathrooms on the ground floor (had to hike up a flight of stairs), and (ii) the outdoor patio wasn't heated. But these are minor in the grand scheme of things.
We were a party of four and we opted to share a few plates including the duck confit poutine, crack chicken, buffalo mozzarella ravioli and the duo of dips. All of them were REALLY good. We all thought the food was absolutely delicious. The portions weren't skimpy, though they weren't especially generous either considering the price.
Around 10:30 / 11:00-ish the place started to really fill up and the party picked up. The music was good (top 40, dance and hip hop) and we danced till the wee hours. The crowd was mixed, mostly mid-to-late 20's but I saw some 30- and 40-somethings there too. Overall I had a great time and would recommend &Co. to anyone looking for a chic and fun dining experience in Mississauga.
PS Mississauga was desperately in need of a place like this. It's nice to have this option outside of Toronto!