We had a falafel and a beef shawarma here last night (11/11/2014). The beef shawarma looked a bit dry but my husband loved it.
My falafel was wonderful - they use a brown sauce which they keep warm on the burner beside the falafel fryer. It was stunningly good! Husband said it was like a Middle Eastern mole. I've never had it before on any other falafel/shawarma. If you want heat you ask for chile sauce separately and of course there's the garlic and tahini.
We usually eat at Ibrahim's and the portions are larger, also great tasting (and a bit cheaper) but they are often out of turnip (we take our own) and they don't have the incredible brown sauce.
We'll absolutely go back to Shawarma Empire.