I personally am just finishing my second week. I have about 379 notes in Anki right now, and about 300 of them are words. I feel like I am learning this language very fast.
http://en.wikipedia.org/wiki/Esperanto <- Read under the Education section. One study said that a native French speaking high school student can learn it in about 150 hours.
https://www.youtube.com/watch?v=Zn2W0GBX-kU <- around the end of this video the speaker says on average is 200 hours, but goes on to mention that people with languages that are extremely different than Esperanto like Chinese would on average only need an aditional 50 hours.
I hope this helps ya.
This is my current level after 5 weeks of study:
Basically I am semi-comfortable talking about specific subjects if I get to think some about it beforehand, but I very often feel like I am limited in being able to express what I want. Love the language though so it won't be long until I feel like I'm somewhat comfortable speaking it.
I had three months of intensive private lessons (= one hour of lesson twice a week ) and I could already converse and write letters after these three months. My private tutor gave me homework to do after every lesson and he always corrected my homework. In the lessons he spoke Esperanto with me.
I would estimate that three months would give a comfortable level of Esperanto. After three months you should be able to undertand and speak enough to get by.
I took me six month of 30 min of daily practise and some meetings to improve.
I used to take some classes on SECOND LIFE too. That was fun