Just stopped in this afternoon, a week or two after the place finally opened, and I'm pleased to report this is the real deal for roast beef sandwiches.
The beef is sliced just thick enough to provide a bit of chew, and tastes properly beefy. (It's arguably a touch underseasoned: I might should have taken him up on his offer of a little salt and pepper.) It's not fatty, rubbery or processed-tasting.
I went with the option of a toasted onion roll (white and wheat rolls also available) and the house sauce, a sweet-hot barbecue sauce that's got a surprising thickness and depth of flavor. They would do well to sell it by the pint during grilling season.
Sides are minimal: bags of Utz chips and soft drinks. The owner, D.J., said they were bringing in a fryolator in a couple weeks and reacted positively to my suggestion of tater tots as one of the deep-fried options. D.J., incidentally, is a South Shore guy who says he basically opened the restaurant because he was tired of having to drive all the way to Brockton for a decent sandwich.
This is the kind of place Chowhound was made for: it's a tiny place in a slightly awkward spot that's delivering considerably better food than I expected it to, and at popular prices: large sandwich (and it is!), bag of chips, side of homestyle sweet-hot pickles for $8.50. I was only hoping it would be better than the rather disappointing and sterile Kelly's up the road, but in fact, it was as good a roast beef sandwich as I have had inside the city limits of Boston. I'd love to see these guys succeed, and if word gets out and they can keep up the quality when it does, this could turn into a neighborhood institution.
It's located on the corner of Comm Ave and Naples Road, across the street (and the streetcar tracks) from the Packards Corner Star Market. Open until 7 p.m. Monday-Saturday, closed Sunday. Later hours coming, supposedly.