I take observational studies with a pinch of salt because they are not studies where alternative tapres are compared and contrasted in controlled conditions. Their "conclusions" more properly would be called a summary of what they saw.
Try tripadvisor or booking.com and preferably use the flipkey service to assure honesty. I have been twice and one time we lost some money by the person making a booking falling for a con by going to direct email.
Personally I did well with travelling in on the Friday to give plenty of time to look round, see the expo, etc. Both times the Boylston and Boston Common area was very handy.
Yeah, start with a minute or max 1 km per session and build slowly. IMO a lot of the benefit comes from shortening the stride to get a higher turnover so that the heel is not so far out in front each step. There's no clear evidence of reduced injury rate for FF or that it is better. But if you already have problems attributed to heelstriking eg knee, then it might be worth shifting part of the load somewhere else eg calf and achilles.
I use them now to the exclusion of everything else. They slip down a treat and, unlike Gu, they don't get too stiff in cold weather. I tend to carry one for every half-hour in a marathon so that I am not dependent on (sometimes chaotic) drink stations. But if I do get a sports drink it's a nice top-up to about the 250 cal per hour I can handle.