The mall has come along way from what it was. Its gone through several updates and once again its being updated. They have a really good food court, you can always find seats and the tables are clean. The number of stores that are geared towards the trendy / hipster crowd has increased substantially. This has also increased the price point of items. I'm a bargain hunter so, I always look around before buying, so my advice would be to steer clear of the trendy hipster type stores, they usually significantly markup the prices of the clothes and accessaries and then discount it to make it look like a deal. This is true for most malls, but I find it true especially for Markville, I guess this is because there is not much competition in terms of malls in Markham when compared to Toronto.
Other than that, there is always people walking around at Markville that do nothing, they just walk around to pass time. I can understand if it was Eaton's centre with the tourists, but its Markham. This Drives me crazy because they get in your way when your in a rush and don't have the decency to move to the right. The same goes for escalator service, people at Markville have no clue about standing right and letting people on the left pass them. They just stand in the middle and look around with these blank expressionless faces.