I have been to Caffe Sienna once before, many years ago, and even now it is still as busy as it was back then. Every time I walk by the place is always packed. My BF and I went on a Wednesday night after work and happily got a table without wait after walking in off the street. I imagine on the weekend this would be a more challenging feat.
The menu has a good variety, the prices not too bad, but certainly more towards the expensive end for a cafe. The staff seem all very friendly. The food comes a little slow, but overall service was good.
We started with chicken skewers, served with rice and satay sauce. The chicken was tender but the sauce was more Indian tasting than what I expected.
I got the Sienna burger, which was quite nice, I liked the Beetroot relish, that was a nice touch. The Wagyu meat always helps a burger out. It wasn't the most fantastic burger I've eaten but it was pretty good. The amount of fries that came with the burger was a little overly generous (in the fry bucket and over half the other side of the plate).
The eye fillet was presented nicely with delightful mushrooms to top, the steak was cooked nicely, tender and juicy, but overall the sauce and the meat lacked any flavour so ended up getting salted at the table by my boyfriend.
Overall it seems a good place to hang out especially with some friends, but I don't see why it's so popular when there are many places on Chapel st with similar food.