Went to BLT Burger last night. I thought it was pretty good. But there are a number of reasons why my visit might not be wise to judge the place off of:
1) I went off-hours. I went right at five so the place wasn't packed. Service was attentive. Folks kept coming over to ask how stuff was. So, the service issues during crowded hours were not an issue for me.
2) I ordered the lamb merguez burger. I know, I know, it's not a real burger, but I wasn't in a beef mood. I thought it was tasty. The meat was rare, seasoned nice and peppery on the outside, with the spicy merguez seasoning, surprisingly enough, being conveyed in the yogurt topping. Bun was okay, nothing excellent.
3) I ordered waffle fries; so,I can't tell you what the regular fries were like. These were okay. Seasoned. I would have preferred them crispy, but I like all fries crispy. They were above average, let me say that. Well-cut, not too thick like you get at some places.
4) I like thin milkshakes. I grew up in NY in the 70s and all the coffee shops I went to had thin milkshakes. I can't stand those thick ones you can't sip with a straw; I don't understand the point of them -- why not just stick a straw in a container of Hagn-Daz? Anyway, I had a black and white milkshake at BLT. It was excellent. Probably the best one I've had apart from a Steak n' Shake in Tampa. NY unfortunately has lost their native art of the B&W, especially in coffee shops where they just slop chocolate and vanilla ice cream together. The BLT version was great, and delightfully thin.
So overall, I enjoyed BLT. I would definitely go back for the regular burger and french fries, but as you can see I did not seek out anything that legitimately should be used to gage the restaurant.
Some other bits: on the table they have that yellow paint that Americans like to call mustard, which is to be expected. I really only like mustard with grain (and Coleman's!). The space is very pleasant, and I think a resource in the neighborhood for friends of casual business; for me at least.