We've used Disney Florist many times over the past 6 years - we've spent a ton! They do good work, and deliver great customer service in that they will substitute anything for you. That being said, they have a limited selection, which in my book, they are totally missing the boat. I shouldn't have to pay extra shipping to have an item shipped from the resort hotel or park to the Disney Florist office for my baskets - I've emailed them about this, and talked with them at length, but they don't do much about it.
All of this being said, we won't be doing Disney Florist much any longer for these reasons. Instead, we just ordered a bunch of stuff off of Disneyshopping.com, and will make up baskets after the kids are asleep - much cheaper and better selection of stuff, such as clothes, books and toys. Even got our autograph books and pens in there too!
Good luck with what you decide - they are great to work with, Tiger