This is your average airport club/lounge, with nothing really notable by way of amenities.... definitely nothing worth getting to the airport early for. There's also no complimentary WiFi here (Toronto is NOT in the US, lest we forget! So this is technically an international lounge, which means no complimentary WiFi for members). The staff is friendly though.
It's important to note that this club is after security AND US Customs/Immigration pre-clearance, so if you're a member but not flying out on a US-bound flight (AA or otherwise) from T3, you won't have access to this club.