My stay 6/23/07 was a nightmare. Having booked a pre-paid reservation 9 days in advance online at the Days Inn at 1234 Soldiers Field Rd in Cambridge I checked in to find that there was no room reserved! Instead, I was booked at a nearby Days Inn, also on Soldiers Field Rd. (Being very familiar with Boston and Cambridge I had purposely booked 1234 Soldiers Field Rd because it is a nicer property directly across from the Charles River). The hotel that I was switched to is a beat-up, downtrodden property in a lousy location!
This was clearly a bait and switch proposition by Days Inn. My advice: stay away from these con artists!