Plenty of stores have come and gone (including Eaton's itself), but this mall remains a mainstay for shoppers, especially downtown. The location is probably one of its biggest assets, located right by Yonge-Dundas Square and accessible from two TTC stations.
The Urban Eatery, the mall's food court, is definitely one of the highlights - upmarket food offerings served with real dishes and silverware. Richtree still remains too. Recent renovations have also done a decent job at modernizing the mall, and the glass roof lets in plenty of sunlight. Unfortunately, some of the lower levels feel a bit more cramped, with lower ceilings. The mall also gets pretty stuffy especially when it's crowded.
Huge variety of stores, as the mall essentially takes up a whole city block. Sears and Hudson's Bay right across the street serve as anchors, while other favorites like Apple, Lacoste, H&M, A&F, Hollister, Victoria's Secret, Coach, Indigo, etc. round out the rest. However, there is a conspicuous lack of higher-end shopping at Eaton's; if you're looking for designer stores, then head north for Yorkville/Bloor St.
No free Wi-fi unfortunately, but parking rates are reasonable if you can find a spot. If you live nearby or work downtown then the Eaton Center can be convenient, but to be honest I'd prefer shopping at Yorkdale for a less hectic experience.