I was there Friday night - 2 rooms booked as Cat 3 awards (prior to June 1) - very busy night. They said it was sold out and I got stuck with city rooms.
The manager reception meal and breakfast were both fine - but much larger seating areas than in any ES I've ever stayed. Selection and foods were good.
The large rooms were full of families. I agree with whomever stated ES-Niagara isn't as well suited for single business travelers. Rooms are nice - I really like having a seating area and separate bedroom area.
Valet takes 10-15 minutes.
Easy access to the falls via incline railway - didn't need the car!
Don't get there between 9 and 10 on a Sat morning and expect to be seated right away
Actually the buffet is advertised as running 7-9am only. Though they were seating families just after 9am - that is actually an easy time to get in. I went around 8:30am - that is definitely a peak time on a weekend day...