This is both a grocery store as well as a take out joint, my review will focus on the hot foods portion.
Shaheen seems to maintains high quality food at a mid-low price range. To be honest I really don't like the seekh kababs/tandoori chicken too much, however, both the chicken and veggie biryanis are amongst the BEST I have ever had and are about $5-$6 (oh boy the seasoning/spice is evenly distributed to perfection!). Likewise, the noodles and haleem they have are EXTREMELY good as well.
Unfortunately one issue my family and I have is that they (Shaheen) often seem to be out of certain food - we often drop by at around 5:30-6:00pm or so, and they are supposedly open until 8:00pm so I always found this bizarre.
Overall, I can vouch for the biryani/haleem/noodles and say they are totally worth trying. Just a fair warning though, the food is more on the spicy side!