With the driverless DLR (district light rail) and the Jubilee line we really enjoy Canary Wharf.
Don't know about the Four Seasons because we used to stay at Hilton Canary Wharf which is very close to everything. You could comp Flashback into their executive lounge that has a nice view.
Minor correction cove:
DLR = Docklands Light Rail
On the question of Canary Wharf for a 3 day tourist, it would depend on what you want to see.
Handy for for the Tower of London, Tower Bridge, the Monument, St Paul's and St Katherine's Dock.
If intending to do Central London (Parliament, Embankment, Bucky Palace, Westminster Abbey & Cathedral, West End etc it is a bit of a haul and some tube changes.
Depends if just doing tourist photo stops or shopping as lugging multiple bags and an empty credit card back to dump in hotel can be a pain.
Probably best to work out where you want to go and the go online to TfL route planner and look at times.
Take into account time spent travelling vs cost of hotel for desired location.
Also try to avoid rush hour if returning with shopping - try dropping off shopping by 3 pm at hotel as being "sardined canned" in rush hour with shopping bags and 100's of commuters is unpleasant. A deadline for shopping may also save credit card meltdown!!
Rush hour should be spent in a pleasant location like the pub used for the meet
Final advice on hotels is read trip advisor reviews before booking as many website booking sites tell you how wonderful the hotel is but not the negatives.
Enjoy your trip
Chris (expat Londoner who has re-visited 26 times since 2003 but cheats as stays at his sister's place)