Usually they’re clean, comfortable and affordable like ads say.One in Braintree MA south of Boston though had to close for 7 weeks, maybe permanently due to issues of clientele.. Drug dealers, prostitution, a cop was shot etc. Active facebook group Shut Down Motel 6 Braintree MA
http://www.patriotledger.com/news/20170519/braintree-motel-6-to-close-for-at-least-7-weeks
Some Motel 6s are used for section 8 like housing.
Best not to stay in any that are in a large city.