I love this lil diner! Been here several times over the years, but this is the first time I could actually check-in since using Yelp. The Penn Hills address was correct, but the map location said it was in Squirrel Hill. Therefore, it said you were too far away to check-in while inside the establishment. I messaged the people at Yelp about and it appears they fixed it since I could check-in today! I guess you could say I put Donut Shack on the map lol. I think all but once I've eaten breakfast here. Always leave here full and happy! The owner is a very nice lady and good cook. I like the nar seating area where you can watch your food being cooked. Prices and portions are great. I like the Ultimate and Big Ben breakfast meals. Not much parking out front, but some in the rear I believe. Love the nostalgic decor inside of the classic cars and such. Has a little corner dedicated to Marilyn Monroe and Elvis. Often a senior citizen hangout. I haven't had their donuts before, but they gave a free one once to my girlfriend's daughter. Thumbs up to this family owned establishment! I'll be back soon.