I've never bothered with anemones. Why bother when there are so many corals that are equally beautiful and don't have to be fed all the time. Corals don't move around, don't have to be fed, and are much hardier.
Get corals, leave the anemone in the ocean where they can live and prosper.
Many many anemone's die needlessly due to their feeding requirements not being met, insufficeint lighting, or poor water quality. Many hobbiest buy them without doing the proper research on their care. Anemones also move around to where they want to be, not where you want them to be. The back side off an anemone on the front and center of your aquarium is not very pretty!
FWIW and IMHO corals are the way to go. With good lighting (MH or VHO, depending on tank size), good protein skimming, and off course - properly maintained water quality (which which is a whole new subject in it's self), and good water circulation, corals are very easy to maintain.
I have lost only a Fire Polyp (requires special feeding that I did not provide, I bought them before I reseacrhed them-DOUGH!) and a xenia (they died when I upgraded to MH lamps, I guess I fried them-Double Dough!) in my 20 months in this hobby. I haven't lost the first anemone because I haven't bought any!
I'm sure that others will chime in and tell you that they have kept a such-and-such anemone for X amount of time, but if you research this subject you will find that I speak the truth. I don't know any real statistics, but if I had to guess I would say that it is likely that 80% of corals live and 10% of anemones live, in the average hobbiest rank. This number was pulled directly out of my rear end so I would appreciate it if there are any expert's out there that could give you a factual %, that is...if any such reasearch is available.
My 2 cents!
Louey