Ya Hala : it's cheap, it's busy, it serves nonstop from (I think) 11am till late, and it's not half bad for its price point. The space is quite rushy and noisy - not a place for a relaxing sociable lingering sort of dinner, but friendly and buzzy enough for a quick bite. Lots of tables were already reserved early on a Saturday night, and I think they'll be doing a good chunk of takeaway business as well. There aren't that many spaces so be prepared for it to not necessarily be able to seat you if you don't ring first.
Food is good, simple, slightly bargain-quality Lebanese - it's delicious and healthy and all the classics are all there, but t's not done with the super-finest ingredients or the most interesting. For instance - they use standard watery market tomatoes, there wasn't enough mint in the tabbouleh, spice flavouring the felafel a bit meh, etc. But these are small niggles. Some things (moutabal with proper smoky aubergine taste, meaty allspicey arayes, a sort of squashed-kebab sandwich) really really excellent at any price. Others you might find more interestingly made elsewhere, but nowhere in Brixton or this convenient & quick. Most mezze dishes are about £4.50, hefty wrap sandwiches for less, loads of vegetarian options. Plenty of hot grilled meat dishes/wraps and a soup option if you want something hot. Mains - which I didn't try - £8 to £12ish. Not great that they'd run out of kibbeh - that early on a weekend, too! - and they're sometimes a bit rushed & confused. But service to me seemed friendly, speedy and accurate. You could easily get full for under a tenner, stuff yourself stupid for £15-20, especially if you were in a group and could share.
overall - cheap, cheerful and a welcome addition to Coldharbour Lane imho.
