Wireless Office Environment

I am trying to get some feedback on the stability of a wireless office. We are moving around 75 user to a newly purchased location that has no previous network wiring and will be difficult to wire with the existing wall structure. Although I will have the server room wired up and few outlets througout I was contemplating the real possiblity of a mostly wireless network. I was wanting to hear from any of you that are in an actual situation where you have an office that is mostly wireless and how that is going for you. I intend to use high-end equipment for the wireless but this aside, just how stable and worry-free is it?