The 2021 Buffalo Marathon was my first marathon. Due to lingering Covid issues, there was no expo and the staff mailed bibs to folks. We picked up our "swag" at the finish line.
The race itself was very well organized. The start went off on time and without any problems. The start line and finish line are both in the heart of Buffalo near Niagara Square (which is actually a circle).
There were aid stations at approximately every odd numbered mile and first aid stations at every mile starting around mile 2. It was very hot and humid on race day (75 F at the start and about 80+ F at the finish). There was plenty of water and Gatorade throughout the entire course.

The course itself is mostly flat with a few easy inclines. You run through some really nice neighborhoods, Delaware Park, and part of the waterfront on Lake Erie. Those fans that come out are very supportive. My favorite band was the one playing the really bad version of (Van Halen's) Panama. I had a good laugh.
I hope to run Buffalo again but in cooler weather. I do recommend this race: it is well organized; the volunteers are friendly and helpful; the course is fastish and pretty; and the swag is nice.