Mazarte is VERY overpriced and I think the staff is overstretched. I had my wedding near Los Barriles in November and the flowers did not meet expectations. I consider myself a pretty reasonable person, but I was really disappointed. For example, Martha was supposed to provide a lot of lighting because the venue did not have much in place, and the photographer complained the pictures may not come out right because she failed to do so.
I paid a lot of money too - comparable to the cost of a florist in L.A., and I had to pay everything upfront without seeing a sample of the table decor (she would only send me a sample of my bouquet, which also did not look like we what we agreed to). I was very disappointed.
I think she used to put a lot more care into her work, but may be understaffed or something. I would not recommend her based on my experience. Perhaps if you can see her in person more that I could (only once before the wedding), you'll have better luck. This is tough when it's a destination wedding!