Hi,


I have stayed at the Hilton Toronto in 2019. It is a good hotel.

Both the Hilton and the Doubletree are good for the eaton centre ( from the executive lounge in the Hilton Toronto you could see the doubletree downtown ( they are effectively on opposite sides of the Nathan Phillips square ( city hall) with the hilton being closer to the CN tower ( 10mins walk difference)
The hilton had a good pool and gym


Not sure on the executive lounge situation currently

Doubletree looks fine also

You can walk to the Eaton centre, CN tower , Union station from both ( or the subway is close to both)

Weekend ideas

CN Tower
Toronto islands ( on a nice day)
Ripley's Aquarium of canada ( by the CN Tower)
Casa Loma
Royal Ontario Museum / Gardiner museum)
Fort york
The distillery district for shops and dining
Eaton centre
Toronto railway museum ( in Roundhouse park by the CN Tower)
I would not stay towards the airport if you want to see toronto ( time consuming)

The Embassy suites is out by the airport ( you could consider the UP express between Pearson airport and Union station but is time consuming)
Regards

TBS

Enjoy Niagara Falls also!