Steeplechase Jack's opened very recently, so this is something of a provisional review. Until a place has been open for several months, it's not quite fair to do too extensive a review.
My wife and I stopped in today for lunch. The restaurant is a small storefront in the 300 block of Queen Street, which has recently been redone. Décor is simple, mostly framed rock albums from the 1960s (the greatest era of rock, ever!). As befits a deli, service is informal. I had the Lancaster-sized corned beef reuben, which was served on very good rye bread, and included a very decent amount of good corned beef. The side was bean salad, which was very good as well. My wife had a spinach knish (knishes are one of their specialties), and we shared an excellent almond horn, which had been dipped in dark chocolate, for dessert. A pleasant lunch, and we will return to see how things develop. It's nice to have a touch of New York-style deli food here in Pennsylvania Dutch country.
Some suggestions for improvement. The design of the menu needs to be improved. It feels overly busy. Also, while the menu features their reuben and rachel sandwiches, deli purists would probably like to know that one can get a corned beef and swiss or pastrami sandwich as well. When we arrived, there was no background music playing, so the hum of the refrigeration unit was evident - after a few minutes, the music was turned on, but why no just leave it on? Lose the plastic cutlery and replace it with decent metal knives and forks. It's much better to eat with, and more environmentally-friendly as well!