We had a great stay at the Mariners.
My partner and I stayed in room 24 and our parents at room 25. 25 Was a bit more expensive but worth it because it had a stove, some cooking gear, a bigger fridge, a table and a couch. Everything was perfectly clean, a very courteous young man that was working on the premise even helped us out for a few things, like fixing the TV.
Check-in and check out was autonomous, very easy:
Step 1: type in the 4 digit code
Step 2: twist the lock to the right to unlock (or to the left if you want to lock it)
Other clients in neighboring rooms can sometimes be a little noisy but I guess that's totally normal for a motel :) I would totally stay again!