Highland Farms has been in my grocery rotation for a few years. If I'm desperate for a specific Italian product and I'm in the area, I will pop into here. It's expensive for what you get but it is reliably good quality.
The place is huge when you're comparing it to Starsky and Michaelangelo. Those are the other 2 big European supermarkets in GTA West. I find HF to be better than your average chain like Metro but the prices are substantially more. With a heavy emphasis on Italian products, you have over 9 aisles dedicated to olive oil, pasta, canned tomato and sauces, and espresso & coffee.
The vegetable and fruit selection is better than Starsky but I find HF less fresh than Michaelangelo and Starsky. The butcher area is very good. Lots of selection and good quality. I was unimpressed with their pastry and cakes. They tasted stale and I think they're overpriced.
Service is good as I've never had to wait long. Though this isn't my first choice for groceries, I wouldn't avoid this place and grab the occasional item.