Have you converted to judaism?

Have you been through the process of converting to judaism? Is it difficult? Is it expensive? How long did it take? How did you go about finding the right Rabbi for you?

I have researched alot of websites on the subject but i really feel I need to hear personal accounts and experiences.

I am Jewish although not very observant, and my SO of 4 years is quite seriously considering converting.

Can you help?